The hippies have a code name for bong: "water pipe".
That's like calling a hackey sack a leisure-time toy and not the hypnotic life-destroying, soul-sucking bag of weed that it truly is!
Bongs (that's right, I'm calling then what they are) allow America's youth to ingest drugs without having the higher-order capacity to roll papers. Also, if you spend all your parents money on weed, you don't have to buy more than one bong in order to dismount the white horse. In addition, once the hippie gets high the ability to roll papers is greatly diminished making the bong essential to staying high.
Bongs are also one of the most effective ways of smoking marijuana. Using a "water pipe" can increase THC intake by 63% for most users. This equates to an increase in "high" of 27% according to most studies. It is important to note that the only study is me getting high and writing down a number, but none the less, 27%.