Hydro Flask’s Standard Mouth Flex Straw offers maximum temperature retention with its Honeycomb Insulated cap and is Leak Proof when closed for reliable transport and sipping. The 2 flexible straws are easy to trim and fit all Standard Mouth bottles, while the Flex Strap is perfect for on-the-go use. The straw components are removable and dishwasher safe, and the BPA-free, toxin-free construction guarantees safe refreshment. Not compatible with carbonated or hot beverages.