A gravity bong comes in two different styles. The term can be used to describe both a bucket bong and a waterfall bong. Here’s how they work. Bucket Bong. A bucket bong usually consists of the ...

One style, which some people refer to as a “waterfall” gravity bong, uses the negative pressure of water falling out of a bottle to pull air through the plant material and fill the chamber ...

The smoke from the device, known as a “gravity bong” or “bucket,” was released into a classroom about 9:45 a.m. at Adams City High School in suburban Commerce City.