MacGyvered bongs
Some very inventive and funny bongs made out of useless junk...

Ummmm, tastes like pancakes
Gas masks keep smoke in too
Juice box, tinfoil, pen, check
Geek + stoner = perfection
If MacGyver was a vegan
Plastic drink vessels 101
Darth MaulGyver's bong
Kareem Abdul Jabong
The Big Bongowski
On Gilligan's Island
Super stoker
Lego bong

Yes, that's a giant Goldfish box
Once you pot you can't stop

Bonus link: Super hot chick and her apple bong