A regular bong, usually of decent size, in which the chamber has been filled all the way up to the mouthpiece with ice. Enough water is added, as in a usual bong, to cover the base and most of the stem. The added ice cools the smoke even more than usual water would. The result is one of the smoothest hard hitters in pot smoking.
Whenever I hit the ice bong I dont know when to stop, it usually happens when i pass out from brain failure.