Hydroflask's Standard Mouth Insulated Sport Cap lets you hydrate one-handed and on the fly.

Designed to keep water in your Hydro Flask bottle ice cold, sip after sip. Tough, bright, colourful and insulated! With its loop top lid and stainless steel construction Hydroflask might be the ultimate every-day bottle.

Details

• Compatible with all Standard Mouth bottles (Not Wide Mouth)
• Insulated for enhanced temperature protection
• Quiet, "no whistle" valve
• BPA-Free and Phthalate-Free
• Sport Cap is not intended for use with hot liquids and is not leakproof