for a really cool bowl, not nessecaryily for a bong,you need:

1 bottle Binaca breath spray
1/2in. copper elbow piping
screen
pliers
drill

Use all the breath spray in the can, take off the plastic nossle
and tear off the aluminumand plastic spray mechanism drill holes
in the flat end file off the paint on the flatt side place the
screen over one end then the piping voila a new durable efficient0
bowl