Strong yet flexible, Hydroflask’s Standard Mouth Flex Straw 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 Hydroflask Standard Mouth bottle.
- Honeycomb Insulation helps keep cold drinks cold for 24 hours and hot drinks hot for 12
- Durable, stainless steel pivots allow the strap to move easily
- Compatible with all Standard Mouth bottles
- BPA-Free and Phthalate-Free
- Lifetime Warranty













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