Engineer Bob’s Favorite Tumbler
- The 22 oz. Black tumbler is a crowd pleaser for concerts, sporting events, or even around the house activities.
- Its Double Wall Vacuum Insulation keeps beverages hot for up to six hours and cold items chilled for up to twenty-four hours.
- The tumbler includes an Acrylic push in top with sliding closure for easy use and additional insulation.
- Recommended to hand wash only.