Tree percolators are fun to watch and usually front and center in the middle of a bong chamber so there is no mistaking what percolator you are working with. Inline percolator bongs look like a ...

The Zob 18 Inch UFO and inline percolator bong is one of the best in its price ... assume it is a fake. The 9mm Short Beaker is large and sturdy with 9MM of glass at the base.