I recently received a 30 ounce Yeti Tumbler as a birthday present. It is by far the most expensive cup I have ever used. I was skeptical, why would anyone purchase a $40 cup, how much different could it be?
Let me tell you, this cup is different. Fill it with ice in the morning, add water and walk away. Come back several hours later and you still have ice. Yes, it's that good.