Enjoy the at-home coffee- or tea-sipping experience on the go with the world's first fully ceramic lid. Fits snugly atop the 16oz. Artiasn stainless steel wall tumbler with TrueBarrier™ technology. With double-wall insulation plus copper, your beverages will stay hot for up to 6 hours or refreshingly cold for up to 18 hours. Sleek design fits comfortably in your hand and slides perfectly into your car's cup holder. Complies with FDA, Food Grade, Prop 65.