This is 20oz Vacuum Insulated Travel Tumbler, made of 304 inner and 201 outer stainless steel, which has good thermal insulation effect to keep hot or cold. They are sized to fit most car cup holders and are nice for extended use. Portable for outdoor events, meetings, business trips, commuting, and more. 3 35/64" L x 3 35/64" W x 7 9/32" H