the bubbler has some issues actually

less water means less cooling means hotter smoke which makes it halfway between a pipe and a bong.

basically it works like a carb bong except the bowl and downstem are glass blown in, the downstem goes into the water and the decrease in pressure allows it to bubble when you suck.

Bubblers are good water pipes for the on-the-go smoker that MUST have water but since they can be messy with water, you have to carry a bottle of water around with you. Personally I think it does both jobs poorly. It's a bad bong and a clunky pipe.