The Polaravo 1200ml Stainless Steel Certified Insulated Tumbler tumbler features double wall air insulation, keeping drinks hot for up to 2 hours and cold for up to 4 hours. The inner wall of the tumbler is made from recycled plastic and the outer wall is made from certified recycled stainless steel. The tumbler holds ml so you can stay hydrated in style all day long. Features a splash proof dual vent lid with a twist lock cap. Comes with a food grade recycled straw. Hand wash only.