The 31635 is a 414 mL (14 oz) tumbler with the Campbell Scientific shield on one side and the Campbell Scientific logo on the other. It is a stainless-steel, double-walled, vacuum-insulated tumbler featuring a threaded lid with snap-fit drinking hole. It is spill- and splash-proof. The 31635 can be used with hot or cold beverages and should be hand-washed only.