Back in the day, I had what they called a "Grass Mask." It had a regular type pipe fitted to a tube that ran down to a bowl inside a block of wood. It also had a carb, just in case you wanted to stick a number in there and use the bowl as a carb. Or vice versa. or something like that.

You could inhale through your nose and mouth, or both. It was so cool, and it would fry your arse VERY quickly!