Optimal Temperature Maintenance. Featuring double-wall vacuum insulation. his tumbler keeps your beverages cold for up to 11 hours and hot for up to 7 hours. ensuring you enjoy your drinks at the perfect temperature all day long. 90% recycled 18/8 stainless steel. Recycled stainless steel icon inside the tumbler indicates your Quencher is made from sustainable materials, BPA-free. Double-wall vacuum insulation, Comfort-grip handle, Powder coat finish. FlowState screw-on, 3-position lid, Reusable straw, Car cup holder compatible (base diameter: 3.1 inches), Built-For-Life