This is a great stainless steel 20 ounce tumbler! The outside finish adds just a small amount of texture, and therefore additional grip. When I tested it for keeping water cold and hot, it performed really well. The clear lid has a nice seal, with a straw or hot liquid hole and a breathing hole on the opposite side. There’s nothing about this design to complain about. You can see from my photos that hot water started out at just under 200 degrees and about 5 hours and 45 minutes later it was 125. That’s good!
The cold – filled it with ice and then added tap water at 4:43 pm. At 6:05 am it still had a large chunk of ice. So just over 13 hours and plently of ice. That’s good!
Both of these tests were with the lid on, sitting on our kitchen counter at room temprature.
Pros – design, lid, finish, how long it keeps cold liquid cold and hot liquid hot. What’s not to like?
Cons – haven’t found any.
Review by on April 28, 2016