Keep your drinks both hot and cold with these Ozark Trail Vacuum-Sealed Tumblers. These travel tumblers are made of high-grade stainless steel and are double-walled and vacuum-sealed for maximum temperature control, so it's equally suited to sustaining the temperature of both hot and cold beverages. Features: Great for both hot and cold liquids. Ideal for a range of activities. Durable, made of high-grade, double-walled stainless steel. Long-lasting, anti-corrosive stainless steel. Durable, rust-proof.