Durable standard Hydro Flask Flex Cap is compatible with all Standard Mouth Hydro Flask bottles. A innovate upgrade from previous season caps, with Honeycomb insulation™.
- Compatible with all Standard Mouth Hydro Flask 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