Hydro Flask Standard Mouth Insulated Sport Cap
This insulated Sport Cap designed specifically for your Hydro Flask. Unique ergonomic design, and superior flow rate make this cap perfect for one handed refreshment on the go.
-Insulated for enhanced temperature protection
-Quiet, ?no-whistle? valve
-Increased flow rate
-Soft silicone spout
-BPA-Free and Phthalates-Free