Bongs, or "Water Pipes" have been a favorite choice of smokers for over 2400 years! While the designs, materials, and features of todays bong have evolved significantly from the bongs our caveman ancestors were smokin', the ultimate purpose of water pipes has remained the same: Provide a smooth, cooled and filtered smoke that's easy on the lungs. While the original bongs were made of bamboo, ceramic, and later acrylic, glass bongs became and stayed the most popular option quickly since their inception (and for good reason!). Glass bongs are the easiest to clean, they provide excellent filtration, and if treated carefully, they last for generations. Water pipes are an improvement over traditional smoking pipes by filtering your dry herb or tobacco smoke through water; sometimes through one or more "percolators" (percs) to achieve an extra smooth and chilled smoke. Percs force the bong smoke through many tiny holes underwater, breaking it up into into thousands of tiny bubbles. These tiny bubbles allow more of the bong smoke's surface area get in contact with the water, which cools the smoke very quickly to a temperature comfortable to inhale. Other options include removable or fixed down stems, types of percolators, designs, and ice catchers. Water pipes are available in 10mm, 14mm, and 18mm joint sizes, so be sure to know what size your bong is when buying replacement parts like bowls or ash catchers.