I encourage every club member to take an empty fuel bottle (we all have at least one) and cut the top off but leave the handle. Bring it with them to the field to catch their trash in (paper towels, bad glow plugs, etc). Take it home and dump it. I keep one zip tied to my plane stand. If I need more space for trash than that, I either need to learn to fly better, or bring less crap to the field.

The empties go back in the cooler. (sodas, that is).

Brad