Bongs are the same thing as water-pipes but without the hoses, instead of the hose you have a solid tube. With a regular hookah pipe for example you slowly suck the smoke trough the hose and the water. But, with a water bong the smoke will pass the water in one bang because of pressure difference, thus this is why bongs are called bong !
Glassblowing is a glass shaping technique that was first invented by people called the Phoenicians, this was around %) B.C. ( near the syro-palestinian coast). The earliest evidence of glassblowing comes from a collection of waste from a glass workshop, including fragments of glass tubes, glass rods and tiny blown bottles, which was dumped in a mikvah, a ritual bath in the Jewish Quarter of Old City of Jerusalem dated from 37 to 4 B.C. Some hand blown glass tubes recovered are fire-closed at one end and are partially blown by blowing through the open end while still hot to form small bottles, thus they are considered as a rudimentary form of blowpipe. Hence, tube blowing not only represents the initial attempts of experimentation by glassworkers at blowing glass, it is also a revolutionary step the induced a change in conception and a deep understanding of glass. Such invention swiftly eclipsed all other traditional methods, such as casting and core-forming, in working glass.
Asian are the ones to thank for the shape of these water pipe ( bongs ). People ( especially in amsterdam ) generaly use bongs to smoke what is called today soft drugs which is know as : marijuana /cannabis !
On top of each bongs you'll find a bowl in which you place your smoking herbs. The smoke passes through the liquid ( usualy water ) before getting to the mouth. Some of carcinogens like tar are filtered . The water in the bong also cools the smoke. Using marijuana bongs allow smoke to be inhaled alot more deeply and rapidly. Results is increased efficiency , thus less marijuana is needed.
Don't use tobacco when smoking a bong. use pure herbs.This way you get pure active elements in your lungs creating a clearer feeling. Tobacco has opposite effect :mixing of tobacco with herbs makes you tired faster. You also need to smoke more to feel good.