Standard Mouth Flex Straw Cap fits all Hydro Flask Standard Mouth BottlesStraw is easy to trim to fit your favourite Hydro FlaskFlex Strap is easy to transport and comfortable to carryHoneycomb Insulated cap for maximum temperature retentionLeakproof when closed so you can reliably sip and transport your refreshment without worryBPA-Free & Toxin-FreeRemovable components for easy cleaningCompatible with Small Flex Strap PacksDishwasher safeNot intended for use with carbonated beveragesFlex Straw Cap not intended for use with hot liquidsKeep hot liquids out of the reach of children Colour: Navy_ More info