TUMBLER STAINLESS RMC 30 OZ. by MCM. The Viking Collection® 30 oz. in stainless with laser engraved vintage RMC interlocking logo on front. Tumbler has double-wall insulation, copper lining, a straw lid, and a comfortable handle. Double wall vacuum insulated stainless steel tumbler with copper lining. Lid with Straw opening. Comfortable handle. Hand washing recommended to ensure the life of the imprint. Fits most cup holders.