Vacuum Insulation: The ThermoFlask keeps beverages ice-cold for 24 hrs, and hot for up to 12 hrs with double-wall and vacuum insulation. This BPA Free stainless steel water bottle won't transfer flavors, won't sweat and does not rust.Chug and Straw Lid: This water bottle comes with 2 lids; an innovative leak-proof Chug lid and a newly improved straw lid that has been enhanced for better flow. Both allow easy one-handed or hands free sippingDaily Adventure: Adventure awaits with ThermoFlask insulated stainless steel water bottles. They help you stay refreshed and hydrated for an active lifestyle. Soups and other hot liquids stay heated for hours; cold beverages keep cool throughout the day.Premium Hydration: Our line of insulated hydration solutions come in 14 to 64 oz sizes with a variety of colors. Our insulated water bottles are a convenient size that fits in most cup holders, backpack pockets and in your hand when adventure calls.ThermoFlask Quality: Whether you want a reusable water bottle for camping and hiking, an insulated commuter cup, or just want to hydrate sustainably, ThermoFlask has a stainless steel water bottle for you Keep your beverages cold all day without a cooler (or hot without a microwave!) Our double-wall vacuum insulated stainless steel bottles prevent outside temperatures from affecting the inside beverage temperature so your drink stays just the way you like it; all day long. Great for everyday adventures or outdoor activities like hiking, camping, biking, sports, picnics, and more. Drink the way you want with easy, controlled one-handed drinking. Chug or straw? Your choice. You get both! Note: For maximum flow, please ensure the straw lid is fully extended.