Featuring our full selection from US Caliber Glass, an American company that makes high end bongs and pipes. All US Caliber bongs have unique design usually shaped like bullets or other weapon and gun bongs. These are all made of high quality borosilicate glass and often come in a case for safe keeping. Many Caliber bongs are a combination of metal and glass, fused together perfectly, with intricate percs that really pack a punch. Many Caliber Glass bongs come in a case, allowing them to be safely stored and transported!