Then I read on Paddle My Canoe the shop of my friend Leah, that she used recycled cereal boxes and the like. My first instinct was that she cut them up and made envelopes out of them. Which works, but only for small things. So I experimented, ripped a few boxes, cut a few the wrong way around, and then discovered that it is ridiculously easy to make a professional looking, simple cardboard package with only a bit of packing tape!
there! doesn't that look like a nice professional packing box? You can also cut the cardboard (when it is still flattened) to a custom size - just make sure to leave enough cardboard to make flaps!