DIY bike trunk

I used to do this as a student, and I still see people doing it from time to time. Put a rear rack on a bike and bungie or tie a milk crate onto the rack. This allows you to carry up to 50lbs of stuff on the back of the bike. I once managed two full paper bags of groceries this way.

Contributed by: Ken Clark

note: you need to install a rack on the back of your bike first.