Our Gould Academy 21 oz. Hydroflask Waterbottle will keep beverages cold up to 24 hours and hot up to 12 hours. Fits easily into a backpack, your car cup holder or into a shoulder bag. It is BPA-Free and Phthalate-Free and is constructed with 18/8 Pro-Grade Stainless Steel. The TempShield insulation eliminates condensation.