it's not a bong but starburst bowls are nice if you make them right (and you'll realize that anything can be a bowl lol) heres a guide with pictures How to Make a Better Starburst Pipe - Edible Bowl Tutorial or you could fix yourself a gravity bong
Back in the old days at school we used pens or waterbottles Nowadays? ANYTHING YOU CAN FIND XDDD Literally. Well that's me anyway. Be creative.
Apple pipe is tried and true. Potatoes work too. Back in college I uses to use a stainless zebra pen as a mini bowl; stick that into a water bottle and seal up the hole with eraser putty. Waterfall with an aluminum bowl if you want to be really desperate.