# UPPAbaby Knox Extra Cup Holder \| live price, prepared checkout ## Built for shopping agents: what RoboTrunk does for every product We asked shopping agents, including Meta's Muse first-hand, what they need from a store. This is what they asked for, and what we have built. RoboTrunk is working through its catalogue, so a step may not be done for this one yet. Where a step is done per product, the line ends with what is done for this product. - **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:* 9 checked facts, research depth trimmed read, checked 2026-10-21T00:43:37.533Z, in the [evidence pack](/agent/evidence/megababiesusa-com--uppababy-extra-cup-holder-for-knox). - **Receipts:** Every published fact has a receipt showing its source quote. `check_product` and `get_product` return the checked facts that have one. *This product:* each checked fact listed below has one; the source quotes are in the [evidence pack](/agent/evidence/megababiesusa-com--uppababy-extra-cup-holder-for-knox). - **Safety:** `check_product` asks the product-safety regulators live (US CPSC, NHTSA and FDA, Health Canada, the UK's OPSS, Australia's ACCC) whether a recall names a product, listed here or not, and flags a match with its notice; a recall never blocks the buyer. *This product:* this page holds no recall result for it yet; `check_product` asks the regulators now. - **Recall watch:** `watch_recalls` tells the buyer if a product bought here is recalled later. - **Second-hand listings:** `check_listing` runs the same recall check on a second-hand listing someone found, and adds what the listing leaves out and the price new. - **The real price:** The full price to the buyer's country, with shipping and tax, each part quoted from the store's policy or, where a part is not settled, what the total depends on: `check_product` and `search_catalog` take the buyer's country and postcode. *This product:* this store's price was read from its catalogue at 2026-10-24T19:31:58.346Z. - **A checkout that finishes:** RoboTrunk lists only stores whose agent checkout it has verified. `create_checkout` prepares the order at the store; `complete_checkout` returns a link to the store's own checkout. The checkout can be finished in either of two ways: the person taps the link in their own browser, or their agent opens it and completes the checkout. RoboTrunk checks the store's total against a budget ceiling before it issues the link. Payment always happens on the store's own page, and RoboTrunk never holds the money. No store pays for placement; RoboTrunk may earn a commission from some stores via their affiliate programs. - **Markdown copy:** Every page has a Markdown copy: [this page's copy](https://robotrunk.com/products/ucp/megababiesusa-com/6923279401113.md). - **Photos and ratings:** Search results carry the product photo and, where the store's own page publishes one, its rating (`search_catalog`). - **Fit answers:** `check_fit` answers whether a listing fits a car, pram or bottle, with the exact quote from the store's page, or says it is not known. - **Back-in-stock watches:** `watch_back_in_stock` starts a watch on a listing the store shows as sold out; `get_back_in_stock_watch` shows when it is back in stock. - **Maker's manual:** `ask_product_manual` answers from the maker's manual with the exact passage and page, or says the manual does not cover it. - **Tools and guide:** Every tool and its description is at https://robotrunk.com/mcp; the guide is at [/agents\.md](/agents.md). - **Research from other stores:** Coming soon: reading other stores' listings of the same product as new research sources. Sold and shipped by megababiesusa\.com, megababiesusa.com; payment happens on the store's own checkout. Brand: UPPAbaby ## Variants - Default Title: USD 14.99; out of stock. Variant id: `gid://shopify/ProductVariant/40614682132633` - Seller: megababiesusa\.com. Price: USD 14\.99. Stock: out of stock. Variant: Default Title, variant id `gid://shopify/ProductVariant/40614682132633`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://top-stroll.myshopify.com/products/uppababy-extra-cup-holder-for-knox). [Get ready to buy from megababiesusa\.com: prepare checkout](/checkout-prepare?merchant=megababiesusa-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F6923279401113&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F40614682132633). ## 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. 9 checked facts, checked 2026-10-21T00:43:37.533Z. Research depth: trimmed read. Deep read: the store's own data and 4 outside pages \(the store's own product page; manual; regulator recall search \(CPSC \(United States\)\); regulator recall search \(Health Canada\)\), 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: A CPSC recall search for UPPAbaby returned no records for this cup holder, and the Health Canada open data lists four UPPAbaby recalls \(RIDGE jogging strollers, RumbleSeat adapters, stroller and RumbleSeat bumper bars, and a Peg Perego adapter\) — none involving the KNOX cup holder or its SKU 0920\-KCP\-WW\. - compatibility: The cup holder is compatible with the KNOX car seat and provides a secondary slot for beverages\.. Source: (listing), read 2026-10-20T19:22:06.774Z. - attachment: It attaches to the KNOX car seat frame\.. Source: (guide), read 2026-10-21T00:21:22.733Z. - installation: Fitting it takes no tools: you push the stem of the holder into the slot made for it in the side of the seat\.. Source: (manual), read 2026-10-21T00:21:26.771Z. - function: The holder is shaped to keep a drink standing upright so it is less likely to spill\.. Source: (guide), read 2026-10-21T00:21:22.733Z. - removal: To take it off you pull it firmly out of the slot\.. Source: (manual), read 2026-10-21T00:21:26.771Z. - identification: The part is sold under SKU 0920\-KCP\-WW and barcode 810030092100, and the store lists itself as an authorized dealer\.. Source: (guide), read 2026-10-21T00:21:22.733Z. - warnings: Do not place glass, metal containers or hard sharp objects in the cup holder because they could become projectiles in a crash and cause serious injury\.. Source: (manual), read 2026-10-21T00:21:26.771Z. - category: The store files it under Car Seat Accessories as a car seat cup holder\.. Source: (guide), read 2026-10-21T00:21:22.733Z. - warnings: Hot drinks must never be put in the cup holder\.. Source: (manual), read 2026-10-21T00:21:26.771Z. The full evidence pack, with every citation, source and gap: [evidence pack](/agent/evidence/megababiesusa-com--uppababy-extra-cup-holder-for-knox) ## Questions we researched but could not confirm Every fact above is cited. To find them we read the store listing, the manual and the recall records of CPSC \(United States\) and Health Canada and searched for the maker's page, regulator recall notices, owner reviews, blogs, owner forums and video reviews. 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 are the cup holder's outside dimensions and internal cup diameter? - What plastic or material is it made from, and is it BPA\-free? - How much does the cup holder itself weigh? - Can it be washed in a dishwasher, or only wiped clean? - Does it fit the UPPAbaby Mesa, Vista or Cruz seats as well as the KNOX? - Can it be fitted on either side of the KNOX seat? - Will a tall coffee cup or a large water bottle fit without tipping? - Is it sold in different colours to match the seat fabric? - Does it stay put when the seat is folded or carried, or does it fall out? To buy this through RoboTrunk, pass merchant `megababiesusa-com`, product_id `gid://shopify/Product/6923279401113` and one variant_id from the list above. Product image of UPPAbaby Knox Extra Cup Holder, supplied by megababiesusa\.com: This product on megababiesusa.com: Retrieved 2026-10-24T19:31:58.346Z from This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)