I've used all sorts of shit to make bongs with including fruit and veg,one of my personal faves was a 2 stage potato bong.
I've used ,beetroot jars, glass beakers, cola bottles, melons,brake pipes from a Mitsubishi Lancer, an oil resevoir from a Yamaha DT to name but a few.
Half the fun is seeing peoples faces when confronted by a frozen cucumber bong.