Add this leakproof, insulated Flex Straw Cap to your standard mouth Hydro Flask Bottle to enjoy a cold beverage on the go.

• Standard Mouth Flex Straw Cap fits all Hydro Flask Standard Mouth Bottles
• Straw is easy to trim to fit your favorite 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.
• Also compatible with Small Flex Strap Packs