21oz Standard Mouth Flask

The Hydro Flask 21oz Standard Mouth bottle is ultra-versatile and highly practical, ruggedly constructed for full on-the-trail functionality. The TempShield insulation has been specially engineered to keep contents hot and cold for extended periods of time, with a stainless steel construction for maximum longevity.

• A practical and versatile bottle from Hydro Flask
• TempShield™ insulation - keeps contents cold for up to 24 hours, and hot for up to 12 hours
• 18/8 Pro Grade stainless steel - high quality wear resistant interior
• Standard mouth
• BPA-Free and Phthalate-Free
• Durable powder coated finish
• 21oz capacity (597ml)
• Recommended activity - everyday use / day hikes