Thermos Is1102 Stainless Steel Vacuum Insulated Tumbler W/ Twist Lock Lid,710ml is designed with advanced vacuum insulation that keeps drinks hot for up to 6 hours or cold for 24. Crafted from durable 18/8 stainless steel with a sleek True-Coat finish, it features a leak-proof Dura-Seal lid, a clear Lumiview top, and a Griptec non-slip base for quiet stability. Conveniently fits most cup holders and is top-rack dishwasher safe.