We don't own a Yeti Cooler but have some large and small tumblers. They seem no different hot or cold retention than the ones from Walmart
Same cups out of the same factory. Yeti sued Walmart and lost, if I recall correctly.
I have 2 Lifetime 55 qt for 1/4 the cost of Yeti. I did see a youtube video where Lifetime beat Yeti. As near as I can tell, $90 goes toward the cooler and the other $350 buys the Yeti label.
