I just got a 30 oz Sam's Club tumbler, which I'm assuming is the same as the Walmart one. Price was about $10.00. I've had it for 4 days and am still in complete disbelief at how it can hold ice. I can't believe I've been drinking out of sweaty Nalgene bottles all these years. No coaster needed with the tumbler and I'll never have a drink get warm on me again.