The Hydro Flask 32oz Wide Mouth Flask 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.TempShield insulation - keeps contents cold for up to 24 hours, and hot for up to 6 hours18/8 Pro Grade stainless steel - high quality wear resistant interiorWider mouthBPA-Free and Phthalate-FreeDurable powder coated finish Fits most water filtersCapacity: 900ml