BRRR TUMBLERS 20oz ROCKHOPPER Stainless Steel Double-Wall Vacuum Insulated Tumbler with BOTH Regular and Slide Lid Included Double-Wall vacuum insulated construction that doesn't sweat, and keeps your drink whatever temperature you like it. Hot drinks stay hot, while cold drinks... you guessed it... stay cold Designed to fit easily in your hand as well as most standard cup holders 18/8 Stainless Steel and BPA Free.