Strong yet flexible, the Hydro Flask Stainless Steel Flex Cap 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 for up to 12. Pair it with any of our Standard Mouth bottles.
- Compatible with all Standard Mouth bottles
- Durable, stainless steel pivots allow the strap to move easily
- BPA-Free and Phthalate-Free
- Lifetime Warranty