A friend of mine gave me a 20 oz YETI Rambler in the beginning of June as a gift and it is now something that I carry with me everywhere. The cup does wonders for keeping ice as well as keeping beverages like coffee piping hot. This is actually one thing I do not like about the cup, after you pour coffee into the YETI Rambler you literally can not drink it for quite sometime after. There have been days when I start at 4 am and the coffee is still luke warm at noon. That’s impressive. Well done YETI. As far as holding ice is concerned the Yeti Rambler locks in the cold and keeps beverages ice cold for long periods of time. In fact you can make several drinks before you have to add more ice to your favorite cocktail. Again well done YETI. How do they do it? This is from the YETI Coolers website. ” YETI Ramblers are advanced personal drink coolers made from 18/8 stainless steel with double wall vacuum insulation. Rambler Tumblers will keep your soda or mixed drinks twice as long as plastic cups, and make excellent YETI coffee mug.” Sounds legit to me. But the proof, as they say, is in the pudding. I have had this drink cooler hold ice for nearly 12 hours. Of course they are not the giant ice cubes I started with, but after an extended period of time there was still ice in the cup none the less. Another bonus is that the outside of the drink cooler stays comfortable around your hand. No freezing or scorching hot cup to hold on to. Again well done YETI. Like the bomb proof coolers YETI is know for the Ramblers Series Drink Coolers are also a pricey item. Coming in at around $30 bucks the YETI Rambler is by no means inexpensive. But it will be the last one you ever buy until your friend swipes it at your next party.