Strong yet flexible, the Hydroflask Standard Mouth Flex Cap is the perfect companion for your favorite adventures. 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.
- Compatible with all Standard Mouth bottles
- Honeycomb Insulation™
- BPA-Free and Phthalate-Free
- Lifetime Warranty
