Back in the days when film was still king and digital was a dream, the local boy scout troop would come in and pick up all the little plastic film cans, Stuff them with dryer lint, and then a squirt of lighter fluid. The put the cap on, and go off camping. Open that can, pull out a wad of soaked lint, and poof! gone.
We often had 100+ rolls per day so we had a huge stock. They brought trash bags of them to jamborees to give away.