Zojirushi SX-DN30-NC Stainless Steel Tumbler Mug,

The "smooth mouth" is gentle on the mouth. Even if you fill it with cold beverages, it will not condensate. " Even if you fill it with hot beverages, it won't get hot on the outside. " The interior has a matte finish that makes scratches and dirt difficult to notice. Wide mouth approx. 3.0 inches (7.5 cm). Product size (W x D x H): 3.3 x 3.3 x 3.9 inches (8.5 x 8.5 x 10 Capacity: 0.3L High heat retention and cold retention, "Stainless Steel Vacuum Double Layer Blower Construction" Resists condensation even with cold drinks and stays cool to the outside when filled with hot beverages Inner matte finish; Diameter: Approx. 3.0 inches (7.5 cm); Not dishwasher or dryer safe