Lifefactory 4oz Glass Baby Bottle with Silicone Sleeve - Blanket | live price, prepared checkout

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• Deep research: We read the maker's manual, independent reviews, video review transcripts and the store's own page, and publish each finding with its source and the date read. check_product returns them with a source for each. This product: 75 checked facts, research depth trimmed read, checked 2026-10-10T04:52:31.477Z, in the evidence pack.
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Checked facts

Each fact below was checked against the source it cites before it was published. Each carries that source's link and the time RoboTrunk read it. 75 checked facts, checked 2026-10-10T04:52:31.477Z. Research depth: trimmed read. Deep read: the store's own data and 13 outside pages (the store's own product page; maker page; blog; review; regulator recall search (CPSC (United States)); regulator recall search (Health Canada); video review (derived summary of its captions)), each read in full by RoboTrunk and trimmed to its main content, then written up and checked. Facts from the maker or a manual quote the page word for word; what real users report is summarised with a link to the page read. Recall status was checked directly with CPSC (United States), Health Canada: CPSC recall search for Lifefactory returned no recall records, and Health Canada recall records mentioning Lifefactory also returned none. No recall applies to this exact model.

• freezing: The bottle can be used to freeze liquids when following the Care & Use Guide.. Source: https://dd1dfe-a3.myshopify.com/products.json (listing), read 2026-10-09T19:03:04.916Z.
• safety: The bottles are free of BPA, BPS, phthalates, lead, and latex, and the materials are FDA-approved and meet U.S. and European safety standards.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• nipple shape: The nipple shape did not work for one baby; the baby's lips went around the plastic base and could not get a comfortable latch.. Source: https://www.youtube.com/watch?v=g9JfURvRJ1M (review), read 2026-10-10T04:34:51.171Z.
• UPC: The Blanket variant UPC is 814943021929.. Source: https://dd1dfe-a3.myshopify.com/products/lifefactory-4oz-glass-baby-bottle-with-silicone-sleeve-blanket (guide), read 2026-10-10T04:29:06.253Z.
• included components: The bottle comes with a silicone sleeve, polypropylene cap, ring, stopper, and Stage 1 (0-3 months) silicone nipple.. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• freezing instructions: For freezing, store upright, do not fill to the top, and leave at least 2oz/58 ml of open space from the neck to allow for expansion and prevent glass breaking.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• newborn use: The 4 oz bottle is described as the newborn workhorse, sized for early, frequent feeds.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• durability: The bottles survived many drops from a highchair, stroller, and backpack without breaking; one broke on asphalt after being thrown from a stroller.. Source: https://blueandhazel.com/the-best-glass-baby-bottle (blog, Blue and Hazel, published 2017-02-08), read 2026-10-10T04:30:15.111Z.
• grip: The bottle circumference is a bit bigger than other regular glass bottles, but the sleeve makes it easier for a baby to grip.. Source: https://www.naturalbabygoods.com/lifefactory-glass-baby-bottle-with-silicone-sleeve-review-and-giveaway/ (blog, Natural Mama, published 2010-02-14), read 2026-10-10T04:30:24.178Z.
• long-term use: The same bottles were used for three years; the smaller bottles were converted into milk glasses and the larger ones used for water.. Source: https://mindlessmom.com/lifefactory-bottles/ (blog, Mindless Mom, published 2020-02-02), read 2026-10-10T04:30:33.826Z.
• venting: The bottle does not have a venting system to avoid colic; the review notes that colic affects about 25% of babies, so it may be fine for the other 75%.. Source: https://www.babybargains.com/baby-bottle-review-lifefactory/ (review), read 2026-10-10T04:31:04.915Z.
• drop protection: The silicone sleeve protects the bottle from breaking when dropped; one parent reportedly dropped it on concrete with no chip.. Source: https://ourstart.com/lifefactory-4-ounce-bpa-free-glass-baby-bottle-product-review/ (review), read 2026-10-10T04:31:11.119Z.
• origin: The bottle is made in the USA and France and assembled in the USA.. Source: https://dd1dfe-a3.myshopify.com/products.json (listing), read 2026-10-09T19:03:04.916Z.
• lead testing: Independent XRF testing reportedly found no detectable lead, cadmium, mercury, or arsenic in the glass, colored silicone sleeves, or plastic caps across tested colors and sizes.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• design: The Lifefactory bottle is glass, made in France, has a silicone sleeve to reduce breaking on the go, fits in a bottle sleeve, and has a classic bottle shape.. Source: https://www.youtube.com/watch?v=g9JfURvRJ1M (review), read 2026-10-10T04:34:51.171Z.
• intended use: The Blanket bottle is designed for everyday newborn feeding with durable glass, a protective silicone sleeve, and an included Stage 1 nipple.. Source: https://dd1dfe-a3.myshopify.com/products/lifefactory-4oz-glass-baby-bottle-with-silicone-sleeve-blanket (guide), read 2026-10-10T04:29:06.253Z.
• dimensions and capacity: The 4oz bottle is 6 inches high, 2.5 inches wide, 2.5 inches deep, weighs 0.4 lb, and holds 4 oz (120 ml).. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• sanitizing: The borosilicate glass baby bottle, caps, and silicone parts can be boiled in water to sanitize.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• size progression: Most parents start with the 4 oz bottle and add the 9 oz size around weeks 6 to 8 as feeding volumes increase.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• silicone sleeve: The silicone sleeve is a thin layer that covers the whole bottle including the bottom, and the holes in the sleeve help with grip even when the sleeve has not been washed.. Source: https://blueandhazel.com/the-best-glass-baby-bottle (blog, Blue and Hazel, published 2017-02-08), read 2026-10-10T04:30:15.111Z.
• cleaning: The sleeve can be sterilized together with the bottle and is dishwasher-safe.. Source: https://www.naturalbabygoods.com/lifefactory-glass-baby-bottle-with-silicone-sleeve-review-and-giveaway/ (blog, Natural Mama, published 2010-02-14), read 2026-10-10T04:30:24.178Z.
• drop protection: The bottles were dropped many times, and about three-quarters of the time they stayed intact; the neck is the only place where the glass is left exposed.. Source: https://mindlessmom.com/lifefactory-bottles/ (blog, Mindless Mom, published 2020-02-02), read 2026-10-10T04:30:33.826Z.
• ease of use: The Baby Bargains review says the bottle's narrow opening makes it hard to pour in formula and that cleaning is difficult; the OurStart review in this pack instead describes a large mouth that is easy to clean — the sources disagree.. Source: https://www.babybargains.com/baby-bottle-review-lifefactory/ (review), read 2026-10-10T04:31:04.915Z.
• material safety: The glass is medical grade, the materials are FDA approved, and the sleeve is BPA/BPS-free and phthalate-free.. Source: https://ourstart.com/lifefactory-4-ounce-bpa-free-glass-baby-bottle-product-review/ (review), read 2026-10-10T04:31:11.119Z.
• silicone sleeve: The protective silicone sleeve helps improve grip and reduce breakage.. Source: https://dd1dfe-a3.myshopify.com/products.json (listing), read 2026-10-09T19:03:04.916Z.
• measurement markings: Volume markings are embossed on the silicone sleeve rather than the glass, so if the sleeve is removed there are no measurements on the glass, which some parents find inconvenient for mixing formula.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• portability: The bottle is described as cute and it fits in a diaper bag.. Source: https://www.youtube.com/watch?v=g9JfURvRJ1M (review), read 2026-10-10T04:34:51.171Z.
• material: The bottle is made from high quality thermal shock-resistant borosilicate glass.. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• silicone sleeve availability: Silicone sleeves are not sold separately.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• sleeve function: The sleeve serves impact protection and grip, absorbing shock from drops and giving babies, parents, and caregivers a secure hold.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• sleeve removal: The sleeve can be tricky to pull off, but soaping it up helps it slip off when a deeper wash is needed.. Source: https://blueandhazel.com/the-best-glass-baby-bottle (blog, Blue and Hazel, published 2017-02-08), read 2026-10-10T04:30:15.111Z.
• nipple: The nipple is described as soft and durable, and the baby preferred drinking from this bottle.. Source: https://www.naturalbabygoods.com/lifefactory-glass-baby-bottle-with-silicone-sleeve-review-and-giveaway/ (blog, Natural Mama, published 2010-02-14), read 2026-10-10T04:30:24.178Z.
• weight: The bottle is heavier than most baby bottles, which may make it harder for a child to hold it independently, though this is true of glass bottles generally.. Source: https://mindlessmom.com/lifefactory-bottles/ (blog, Mindless Mom, published 2020-02-02), read 2026-10-10T04:30:33.826Z.
• nipple issues: The nipple can collapse and the bottle can leak if it is tightened too much, and the review site does not consider it a good choice for breastfeeding babies.. Source: https://www.babybargains.com/baby-bottle-review-lifefactory/ (review), read 2026-10-10T04:31:04.915Z.
• compatibility: The bottle is compatible with most major breast pumps.. Source: https://ourstart.com/lifefactory-4-ounce-bpa-free-glass-baby-bottle-product-review/ (review), read 2026-10-10T04:31:11.119Z.
• safety: The bottle is BPA-free and phthalate-free.. Source: https://dd1dfe-a3.myshopify.com/products.json (listing), read 2026-10-09T19:03:04.916Z.
• durability: The sleeve does not cover the very top shoulder of the bottle, so a direct drop at a harsh angle can still occasionally crack the glass, though this is described as rare.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• silicone sleeve: The protective silicone sleeve helps prevent breakage and provides an easier grip.. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• sleeve removal: To remove or put back the silicone sleeve, use warm soapy water to slide it off or on, then rinse and dry.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• dishwashing: The glass bottle can be washed in the dishwasher on the top rack, and the sleeve stays on.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• compatibility: Other standard nipples and most breast pumps fit the bottle, though another brand's lid may not screw on as easily as the Lifefactory lid.. Source: https://blueandhazel.com/the-best-glass-baby-bottle (blog, Blue and Hazel, published 2017-02-08), read 2026-10-10T04:30:15.111Z.
• protection: The sleeve protects the glass and reduces worry about the bottle slipping.. Source: https://www.naturalbabygoods.com/lifefactory-glass-baby-bottle-with-silicone-sleeve-review-and-giveaway/ (blog, Natural Mama, published 2010-02-14), read 2026-10-10T04:30:24.178Z.
• breakage: The bottle is not unbreakable; one broke and pieces were still being found about a year later.. Source: https://mindlessmom.com/lifefactory-bottles/ (blog, Mindless Mom, published 2020-02-02), read 2026-10-10T04:30:33.826Z.
• overall: Fans love the glass bottle and silicone sleeve, but the narrow opening is seen as a big drawback; the review site rated the bottle B-.. Source: https://www.babybargains.com/baby-bottle-review-lifefactory/ (review), read 2026-10-10T04:31:04.915Z.
• durability: The bottle can be frozen, reheated, and washed in the dishwasher with no reported issues, and compared with other glass bottles it is described as lightweight.. Source: https://ourstart.com/lifefactory-4-ounce-bpa-free-glass-baby-bottle-product-review/ (review), read 2026-10-10T04:31:11.119Z.
• care: The bottle is dishwasher safe; place cap parts and nipple on the top rack.. Source: https://dd1dfe-a3.myshopify.com/products.json (listing), read 2026-10-09T19:03:04.916Z.
• cleaning: The bottle is dishwasher safe with the sleeve left on the top rack, and hand-washing the nipple is said to extend its life; the bottles reportedly do not retain odors or stains.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• safety: The bottle is BPA-free and phthalate-free and tested to meet FDA standards.. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• breakage and replacement: The bottles are durable but not unbreakable; plain replacement glass bottles are offered for customers with a U.S. shipping address in the 48 contiguous states.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• sterilization: For sterilization, the glass bottles can be boiled or steam sterilized.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• capacity: The 4 oz bottle actually holds about 5 oz when topped off, and the smaller size was preferred for bedtime.. Source: https://blueandhazel.com/the-best-glass-baby-bottle (blog, Blue and Hazel, published 2017-02-08), read 2026-10-10T04:30:15.111Z.
• customer service: Customer service was reported as slow and ultimately declined replacement glasses after a policy change.. Source: https://mindlessmom.com/lifefactory-bottles/ (blog, Mindless Mom, published 2020-02-02), read 2026-10-10T04:30:33.826Z.
• measuring: Ounce measurements are on the plastic sleeve instead of the glass, which some parents find harder for accurate measuring.. Source: https://ourstart.com/lifefactory-4-ounce-bpa-free-glass-baby-bottle-product-review/ (review), read 2026-10-10T04:31:11.119Z.
• material: The bottle is made with thermal shock-resistant borosilicate glass.. Source: https://dd1dfe-a3.myshopify.com/products.json (listing), read 2026-10-09T19:03:04.916Z.
• weight: The 4 oz bottle weighs about 0.4 lbs empty, and some users note that glass bottles can be heavy for young babies to hold independently once they try to self-feed.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• care: The bottle is dishwasher safe; cap parts and nipple should go on the top rack, and the silicone sleeve does not need to be removed.. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• replacement request: Replacement bottles must be requested directly through a Lifefactory representative.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• warming: The borosilicate glass bottle is thermal shock resistant and safe for warming in a bottle warmer or warm water bath; do not use in the microwave because it can heat unevenly.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• lead safety: The bottles contain no lead, unlike some other glass bottle brands that use lead-based paint for markings on the outside of the glass.. Source: https://blueandhazel.com/the-best-glass-baby-bottle (blog, Blue and Hazel, published 2017-02-08), read 2026-10-10T04:30:15.111Z.
• sippy cup: The sippy cup attachment is plastic, though using a paper straw can avoid plastic contact.. Source: https://mindlessmom.com/lifefactory-bottles/ (blog, Mindless Mom, published 2020-02-02), read 2026-10-10T04:30:33.826Z.
• air intake: Some parents reported that the flow allowed a lot of air into the nipple, which may not suit babies with bad reflux, and the nipple can collapse if a child drinks too fast with vigorous sucking.. Source: https://ourstart.com/lifefactory-4-ounce-bpa-free-glass-baby-bottle-product-review/ (review), read 2026-10-10T04:31:11.119Z.
• compatibility: The narrow-neck bottles are compatible with most major breast pumps, and some users report fitting Medela and Dr. Brown's vented nipples; the 8 oz wide-neck bottle uses a different nipple system that is not interchangeable with the narrow bottles.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• origin: Glass and silicone nipple are made in France; cap and silicone sleeve are made in the U.S.; the product is assembled in the U.S.. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• nipple venting: The silicone nipples have a traditional venting system with ridges on the flange; tightening the ring too much can prevent ventilation and cause nipple collapse.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• cap compatibility: The 4 oz and 9 oz narrow neck glass baby bottles use the same storage and sippy caps.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• cleaning: The OurStart review describes the bottle's mouth as large and easy to clean and says it converts into a sippy cup with an additional piece; the Baby Bargains review in this pack instead describes a narrow opening that is hard to pour into — the sources disagree.. Source: https://ourstart.com/lifefactory-4-ounce-bpa-free-glass-baby-bottle-product-review/ (review), read 2026-10-10T04:31:11.119Z.
• modularity: The 4 oz and 9 oz narrow bottles share the same caps and accessories, so the bottle can transition from a nipple to a sippy spout and later to a straw cap.. Source: https://glassbabybottle.com/lifefactory-glass-baby-bottles/ (review), read 2026-10-10T04:31:28.885Z.
• item number: The Blanket color item number is LF110015C4.. Source: https://lifefactory.com/products/4oz-glass-baby-bottle (guide), read 2026-10-10T04:29:35.557Z.
• nipple stage included: The 4 oz baby bottle includes the Stage 1 (0-3 months) silicone nipple.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• stage timing: A 4 oz bottle with Stage 1 nipple is recommended for newborn to about 4 months.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• accessory compatibility: The 4oz and 9oz glass baby bottle can use Stage 1, Stage 2, Stage 3, Y-cut nipples, Sippy Caps, and a Flat Cap for storage.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• cleaning tip: A bottle brush is helpful for hand washing around the shoulder of the bottle where residue can collect.. Source: https://lifefactory.com/blogs/news/the-complete-guide-to-lifefactory-glass-baby-bottles-what-every-new-parent-needs-to-know (guide), read 2026-10-10T04:30:07.549Z.
• safety testing: All products are subjected to rigorous testing by independent testing laboratories to meet Lifefactory's safety standards.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• glass benefits: Glass is reusable, offers a pure taste, and harmful chemicals will not leach into liquids.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.
• sleeve purpose: The silicone sleeve is designed to protect the bottle from bumps and drops, improve grip, and reduce potential breakage.. Source: https://lifefactory.com/pages/faq (guide), read 2026-10-10T04:29:51.032Z.

The full evidence pack, with every citation, source and gap.

Questions we researched but could not confirm

Every fact above is cited. To find them we read the store listing, the maker's page, blogs, owner reviews, video reviews and the recall records of CPSC (United States) and Health Canada and searched for the manual, regulator recall notices and owner forums. We also chased the questions below across those sources and found no reliable answer, so you know exactly where the evidence ends and never have to guess.

• What is the warranty period and what does it cover?
• What specific safety certifications does this bottle hold?
• What is the exact flow rate of the Stage 1 nipple?
• Does the bottle fit standard car cup holders?
• Can the bottle be frozen with the silicone sleeve left on?
• What is the exact inner diameter of the bottle neck?
• Is the bottle compatible with formula mixing pitchers?
• Does the bottle pass European safety standard EN 14350?
• Are there any reported incidents of breakage causing injury?
• What is the bottle's recommended replacement schedule?
• Can the bottle be used with a microwave sterilizer bag?
• What is the nipple material hardness?
• Does the Blanket color sleeve have the same texture as other colors?
• What is the bottle's drop-test rating or impact resistance?
• Does the bottle come with a nipple cleaning brush?

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