Standard Mouth Flex Straw Cap

Hydration on the go just got easier with the leakproof, insulated Hydro Flask Flex Straw Cap. Add it to your favorite Standard Mouth Hydro Flask bottle (not included) to enjoy cold hydration anywhere. Flex Straw Cap makes cold refreshment that much easier, and it's leakproof when closed for worry-free transport Flex Strap makes this bottle comfortable to carry Honeycomb™ insulation maximizes temperature retention Not intended for use with hot liquids Dishwasher safe for easy cleaning