Sip. Refresh. Go.
From mountain trails to morning yoga classes, our Standard Mouth Insulated Sport Cap makes all your adventures better. It’s the first insulated sport cap specifically designed to keep the ice water in your Hydro Flask bottle cold, sip after sip. Plus, the unique design lets you hydrate one-handed, whether you’re checking out wild flowers in the wilderness or showing off your warrior pose in the gym.
Compatible with all Standard Mouth bottles
Insulated for enhanced temperature protection
Quiet, "no whistle" valve
BPA-Free and Phthalate-Free