Hydration on the go just got easier with our leakproof, insulated Flex Straw Cap. Add it to your favourite Standard Mouth Hydro Flask bottle to easily enjoy cold hydration anywhere.

- Standard Mouth Flex Straw Cap fits all Hydro Flask Standard Mouth Bottles
- Straw is easy to trim to fit your favourite Hydro Flask
- Flex Strap is easy to transport and comfortable to carry
- Honeycomb Insulated cap for maximum temperature retention
- Leakproof when closed so you can reliably sip and transport your refreshment without worry
- BPA-Free & Toxin-Free
-  Removable components for easy cleaning.