If you are looking for a more compact water pipe, then a bubbler might be the best bet. These pipes diffuse smoke through water and offer a smooth smoking experience. Simple handheld bubblers have a bowl and downstem that are fixed inside the bubbler and they work well as hand pipes with a little more filtration. If you are looking for a piece to keep at home scientific bubblers like the Upright Bubblers from Grav are amazing pieces with female joints that can fit both smoking bowls and dab bangers.