yep, had to place a fermenter in an ice bath recently. Also used the swamp cooler trick once the ice melted: you put it in a tub of water, put a wet shirt over it and have a fan blow on it. As the water evaporates, you get refridgeration, and the shirt wicks up more water from the bottom of the tub. Then you resolve to buy a keezer instead of a small kegerator. Also, the water needs to be changed daily or treated with something to keep the nasties down.