Buying a Glass or Silicone Bong
Glass bongs are almost always the best because you can clean them to a neutral where Silicone Bongs can stand the test of the trunk of your car.
Percolator Bongs - Everything You Need To Know
It's actually smoother when you smoke out of a bong with a percolator. The Water is forced through vents which helps separate the smoke from the carbon, ash, and resin.
How To Clean A Bong
All glass, silicone, and acrylic bongs can be cleaned. For glass bongs you can use Orange Chronic Cleaner or 99 proof alcohol and coarse salt.