I actually just bought one of these the other day after looking for a good drinking glass (haha). This is the one I decided on, mainly because of the rubber on the bottom. It acts like a coaster, and there is nothing worst then having a drink on a coaster, and having the coaster be stuck to the bottom of the drink every time you pick it up. Not only with this thing keep your drink cold for an extended period of time, but it also keeps the condensation on the inside of the glass, while protecting your furniture at the same time. The first thing I did when I got home with this thing was pour myself a delicious brew, and I could definitely tell the difference. A little pricey, but well worth the money.