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Strong yet flexible, the Standard Mouth Flex Cap by HYDRO FLASK is the perfect companion for spontaneous campouts, epic road trips, and everything in between. Made with stainless steel pivots and an easy-to-carry strap, this cap has Honeycomb Insulation™ to help keep your drinks cold for up to 24 hours or hot up to 12. Pair it with any of Hydro Flasks Standard Mouth bottles.
Details
- Compatible with all Standard Mouth bottles
- Honeycomb Insulation™ helps keep cold drinks cold and hot drinks hot
- Durable, stainless steel pivots allow the strap to move easily
- BPA-Free and Phthalate-Free
- Lifetime Warranty
Fitting Chart
Notes About Measuring Your Feet
Because they are flat, rulers can only approximate the size of your foot. Don't forget that manufacturers measure shoe sizes differently, and as a result, sizes may vary. When measuring your foot, ensure that you are standing and wearing the socks or stockings that will be worn with your new shoes when they arrive.
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| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 4 | 35 | 1 | 8.1875" | 20.8 |
| 4.5 | 35 | 1.5 | 8.375" | 21.3 |
| 5 | 35-36 | 2 | 8.5" | 21.6 |
| 5.5 | 36 | 2.5 | 8.75" | 22.2 |
| 6 | 36-37 | 3 | 8.875" | 22.5 |
| 6.5 | 37 | 3.5 | 9.0625" | 23 |
| 7 | 37-38 | 4 | 9.25" | 23.5 |
| 7.5 | 38 | 4.5 | 9.375" | 23.8 |
| 8 | 38-39 | 5 | 9.5" | 24.1 |
| 8.5 | 39 | 5.5 | 9.6875" | 24.6 |
| 9 | 39-40 | 6 | 9.875" | 25.1 |
| 9.5 | 40 | 6.5 | 10" | 25.4 |
| 10 | 40-41 | 7 | 10.1875" | 25.9 |
| 10.5 | 41 | 7.5 | 10.3125" | 26.2 |
| 11 | 41-42 | 8 | 10.5" | 26.7 |
| 11.5 | 42 | 8.5 | 10.6875" | 27.1 |
| 12 | 42-43 | 9 | 10.875" | 27.6 |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 6 | 39 | 5 | 9.25" | 23.5 |
| 6.5 | 39 | 5.5 | 9.5" | 24.1 |
| 7 | 40 | 6 | 9.625" | 24.4 |
| 7.5 | 40-41 | 6.5 | 9.75" | 24.8 |
| 8 | 41 | 7 | 9.9375" | 25.4 |
| 8.5 | 41-42 | 7.5 | 10.125" | 25.7 |
| 9 | 42 | 8 | 10.25" | 26 |
| 9.5 | 42-43 | 8.5 | 10.4375" | 26.7 |
| 10 | 43 | 9 | 10.5625" | 27 |
| 10.5 | 43-44 | 9.5 | 10.75" | 27.3 |
| 11 | 44 | 10 | 10.9375" | 27.9 |
| 11.5 | 44-45 | 10.5 | 11.125" | 28.3 |
| 12 | 45 | 11 | 11.25" | 28.6 |
| 13 | 46 | 12 | 11.5625" | 29.4 |
| 14 | 47 | 13 | 11.875" | 30.2 |
| 15 | 48 | 14 | 12.1875" | 31 |
| 16 | 49 | 15 | 12.5" | 31.8 |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 8 | 24 | 7 | 5.8 | 14.6 |
| 8.5 | 25 | 7.5 | 6 | 15.2 |
| 9 | 25 | 8 | 6.2 | 15.6 |
| 9.5 | 26 | 8.5 | 6.3 | 15.9 |
| 10 | 27 | 9 | 6.5 | 16.5 |
| 10.5 | 27 | 9.5 | 6.6 | 16.8 |
| 11 | 28 | 10 | 6.8 | 17.1 |
| 11.5 | 29 | 10.5 | 7 | 17.8 |
| 12 | 30 | 11 | 7.1 | 18.1 |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 13 | 31 | 12 | 7.5 | 19.1 |
| 13.5 | 31 | 12.5 | 7.6 | 19.4 |
| 1 | 32 | 13 | 7.8 | 19.7 |
| 1.5 | 33 | 14 | 8 | 20.3 |
| 2 | 33 | 1 | 8.2 | 20.6 |
| 2.5 | 34 | 1.5 | 8.3 | 21 |
| 3 | 34 | 2 | 8.5 | 21.6 |
| 3.5 | 35 | 2.5 | 8.6 | 21.9 |
| 4 | 36 | 3 | 8.8 | 22.2 |
| 4.5 | 36 | 3.5 | 9 | 22.9 |
| 5 | 37 | 4 | 9.2 | 23.2 |
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