HydroFlask Standard Mouth Sport Cap
From mountain trails to morning yoga class, the 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.
- Compatible with all Standard Mouth bottles.
- Insulated for enhanced temperature protection.
- Quiet, no whistle valve.
- BPA and phthalate free.