Sitting in the cup holder between the front seats inside a hot car with the windows rolled all but about a 1/4" closed my Ozark Trail 30 oz tumbler still has some ice cubes left after 4-5 hours. The water stays good and cold for a long time after the ice has all melted. Started with about 1/3 ice cubes and 2/3 water.
Yesterday I saw a promotional display set up in the middle of the floor at a convenience store stocked with yet another brand name I've never heard of before but are exact physical copies of the Yeti and Ozark Trail 20 and 30 oz tumblers, Only difference I could see was the brand logo.
