soda can.. or use a socket as the bowl and make ur self something nice. use the search and type in home made u will find many ideas
avoid pop cans. the paint burns on em and it doesnt taste too great. ive heard its not soo great for ya either. Neither is a foil bowl. Use an apple =) easy to make and you can eat the eviddeennceeee
Fruits work surprisingly well. You can make a gravity bong with a ratchet and a soda bottle. Lots of homemade things, but it really depends on what you have lying around your house.
make a carrot chillium, its healthy to smoke out of and makes a healthy snack when you get the munchies <object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/DRuYhuGEGj4&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/DRuYhuGEGj4&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>