Beaker base bongs have a large chamber below for water. The water makes for a smoother way to medicate. An addition of a percolator makes it even smoother. These styles of bongs usually have a slower more even draw then the straight tube styles.
Straight Tube Style
Straight tubes are a quick way to medicate, usually a faster intake then most other styles of bongs. These styles use less water then beaker base styles.
Round Bottom Style
Round-base bongs are similar to beaker bongs in that the base is wider than the tube and the mouthpiece. RB bongs have a sphere-shaped water chamber with a flat base. They are more stable than straight-tube bongs, but slightly-less stable than beaker bongs because the flat surface is smaller. Regardless of style, the mechanics are all similar.
A multi-chamber bong, sometimes called a recycler bong, is a variation of the straight-tube bong (although the chamber can come in various shapes). In a multi-chamber bong, the straight tube is separated into two chambers connected by a tube or third chamber. Both upper and lower chamber hold water so the smoke is filtered twice. This produces a much cooler, much smoother smoke than the straight-tube, beaker, or round-base bong can provide. Due to the complexity, multi-chamber bongs are more expensive and harder to clean.
Gravity Bongs rely on the vacuum that water leaves behind when it leaves an enclosed space. Gravity bongs come in two types: bucket and waterfall. The simplest version of the bucket gravity bong uses a plastic bottle and a bucket/container full of water. This is a fun project to try now and again, but if you use this type of bong regularly, you’ll probably want to purchase a professionally-built model.
Waterfall Gravity Bong
When everything is assembled, light your cannabis and let the water drain from the bottle. As the water leaves, it pulls the smoke down into the bottle. When the water has completely drained, plug the hole with your finger or tape, remove the cap from the top, and inhale to your heart’s (or lung’s) content. As with the bucket gravity bong, you can make a waterfall gravity bong from household materials. But if you want to use it regularly, purchase a professionally-built glass or plastic model.