MoMA Exclusive: Sporting the bold color combinations designer George Sowden is known for, this stainless steel thermal flask keeps cold drinks cool for 24 hours and hot drinks warm for 12 hours. George Sowden is a founding member of the Memphis Design Group and Memphis objects are represented in MoMA’s collection. The George Sowden Thermal Flask measures 6.3h x 2.7”diam. and holds 13.5oz. Hand wash only.