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Adapters & couplers
Hydro Flask 21 oz bottle cage holder for bike
A cage that holds an insulated Hydro Flask 21 oz or 24 oz standard mouth bottle (73 mm diameter) on a bike, keeping coffee hot or water cold on a commute or a long gravel day. It bolts to the frame with two M5 slots on 64 mm centres, wraps the bottle in a 74 mm cradle 110 mm tall with 3.5 mm walls, and has a rubber-lined 15 mm lip and a top strap slot because a full steel bottle weighs over 600 g. Print it upright in PETG or ASA at 40 percent infill; the open front needs no supports. Open the ready-made model free, resize it on your phone or computer, then download a print-ready STL, 3MF or G-code sliced for your printer, free.Opening the ready-made model and downloading it as STL or 3MF are free, no card; AI changes use credits, from Maker at $7.99 a month.No printer? We print this part and ship it to your door. See its priceUpdated
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Adjust
Change its numbers in the viewer for free, or ask the AI in the chat: wall thickness, hole size, the thing it clips onto. AI changes use 2 credits per request (1 for a quick edit, 3 for a redesign), paid with a plan from Maker at $7.99 a month.3Print
Download a watertight STL or 3MF free, with your numbers and hand edits, or G-code sliced for your printer at the same price. After an AI change the download is included in every plan (4 credits without one).
Dimensions of the ready-made model (editable)
| Parameter | Value |
|---|---|
| inner diameter of cradle | 74 mm |
| cradle wall thickness | 3.5 mm |
| cradle height | 110 mm |
| floor thickness | 3 mm |
| drain hole diameter | 10 mm |
| top retaining lip height | 15 mm |
| how far the lip protrudes inward | 4 mm |
| width of open slot (arc chord approx) | 20 mm |
| M5 clearance | 5.5 mm |
| tab width | 16 mm |
| tab height (along cradle axis, per tab) | 20 mm |
| how far tab sticks out from cradle wall | 8 mm |
Example prompt
Model a bike bottle cage for a 73 mm diameter insulated bottle with a 74 mm inner diameter cradle 110 mm tall, 3.5 mm walls, a 3 mm floor with a 10 mm drain hole, a 15 mm retaining lip, two M5 slots on 64 mm centres and a 20 mm strap slot.
Fit notes
Insulated bottles from Hydro Flask, Yeti and Stanley all differ by a few millimetres, enough to make a generic cage rattle or refuse to release. Give SpeakCAD your bottle diameter and weight, preview the cage in the browser, adjust the grip in the chat, then download the STL.
Questions people ask about a Hydro Flask 21 oz bottle cage holder for bike
A cage that holds an insulated Hydro Flask 21 oz or 24 oz standard mouth bottle (73 mm diameter) on a bike, keeping coffee hot or water cold on a commute or a long gravel day. It bolts to the frame with two M5 slots on 64 mm centres, wraps the bottle in a 74 mm cradle 110 mm tall with 3.5 mm walls, and has a rubber-lined 15 mm lip and a top strap slot because a full steel bottle weighs over 600 g. Print it upright in PETG or ASA at 40 percent infill; the open front needs no supports.
Click Open it free on this page and create a free account (no card): the ready-made model opens in your browser, on your phone or computer, nothing to install. Change its numbers in the viewer for free and download a watertight STL or 3MF free, or G-code sliced for your printer at the same price. An AI change in the chat uses 2 credits per request (3 for a redesign), and the download after it is included in every plan (4 credits without one). Start with Maker: 50 credits a month for $7.99, cancel anytime.
On this page: open the ready-made model free in a SpeakCAD account (no card), change any dimension in the viewer, then download the STL or 3MF free, or G-code sliced for your printer at the same price.
A shared STL is modelled for someone else's measurements. Here you open the ready-made model free, change it to your measurements in the viewer, then download a file sized for the part you actually own, free as STL or 3MF.
Yes. SpeakCAD slices the part on its servers with OrcaSlicer and your printer's official profile (380+ printers, including Bambu Lab, Prusa, Creality and Elegoo), and you download the G-code (a sliced .gcode.3mf for Bambu Lab printers). G-code sliced for your printer costs the same as the STL: included in every plan, free for a part you shaped by hand, 4 credits without a plan for a part with AI work in it. Pick your printer on the printers page to see its profile.
No. SpeakCAD runs in the browser on your phone or computer: the chat, the 3D engine and the live viewer load in the tab. The only file you download is the finished STL, 3MF or sliced G-code.
Print it your way
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