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

• Leakproof when closed
• Straw is easy to trim to fit your favorite Hydro Flask
• Flex Strap is easy to transport and comfortable to carry
• Insulated for maximum temperature retention
• Removable components for easy cleaning
• BPA-Free
• Dishwasher safe
• Not intended for use with hot liquids