Sip. Refresh. Go.

From mountain trails to morning yoga class, our Standard Mouth Insulated Sport Cap lets you hydrate one-handed and on the fly. It’s the first insulated sport cap specifically designed to keep water in your Hydro Flask bottle ice cold, sip after sip. Product Benefits

• Compatible with all Standard Mouth bottles
• Insulated for enhanced temperature protection
• Quiet, "no whistle" valve
• BPA-Free and Phthalate-Free
• Lifetime Warranty