The easiest way to make a decent bong is get a 2 litre bottol, say of coke, then get some hose pipe, and cut a hole in the bottol towards the bottom, and put the piece of hose into the bottol at a 45 degree angle. Make anther hole in the top of the bottol. Now get a soket that fits perfectly into the hose end. Fill up the bottol so the piece of hose in the bottol in under the water, but not too much that it leaks around where the hose enters. Put your bud in the soket, cover up the whole at the top, take the cap off and suck through it.

When you have got a bottol full of smoke, take your finger off the hole at the top and breathe in all the smoke. You've made a cheap bong that will get you high. Congrats.