Our Standard Mouth Insulated Sport Cap lets you hydrate one-handed and on the fly anywhere you might need to go! It is the first insulated sport cap specifically designed to keep water in your Hydro Flask bottle ice cold, sip after sip. Compatible with all hydroflask Standard Mouth bottles. BPA-Free and Phthalate-Free Sport Cap is not intended for use with hot liquids and is not leakproof. Insulated for enhanced temperature protection.

• Compatible with all Standard Mouth bottles
• BPA-Free and Phthalate-Free
• Sport Cap is not intended for use with hot liquids and is not leakproof
• Insulated for enhanced temperature protection
• Lifetime Warranty