Originally posted by I
I remember reading somewhere that when you smoke from a joint or blunt, you end up losing about 90% of the THC (meaning, 90% of the smoke ends up floating up to the ceiling). If you smoke from a bowl or pipe, you end up losing about 60% of the THC. But when you smoke from a bong, you only lose about 10% of the THC. So, a bong is the most effective way to smoke.
I dont believe you loose that much from a joint or blunt. The vaporizer is the way to get the most thc though.