it's hot as hell today in So Cal, canned beverages don't cut it, big cups aren't any better because the ice melts and the drink becomes watered down and not even that cold very quickly. The X-Treme Gulp cup is science at its best, it keeps my beverage cold for hours and the ice takes a long time to start melting. Aside from being ginormous and a pain to lug around these cups are great. Not too expensive too with the first fill up being free. it's like 85 in my room, and my soda still has Ice in it and I've had the drink for FOUR hours, amazing!