Your beverage stays perfectly hot or cold no matter where your day takes you with the Hot Cap. This tumbler is double wall 18/8 grade stainless steel with copper vacuum insulation for ultimate conductivity to keep drinks hot for 8 hours and cold for 24 hours. On-trend, durable powder coating. The twist-open leak proof cap allows 360? drinking. Wide mouth opening for easy cleaning and filling. Recommended to hand wash only. 20oz. 18/8 Grade Stainless Steel. 3" x 3" x 9".