Reviving an old, but still relevant thread. As Bluefox said in the first post, styrofoam box troughs did start with the famous Scottish rock gardener, Ian Young. He still lives near a manufacturing plant in Aberdeen that makes styro boxes for shipping fish, etc. and he would get the reject boxes to play with.
Anyway, a few more ideas for you all in a thread that I started years ago:
https://www.nargs.org/styrofoa...
