Yes Roly, the egg crate is made of a paper mash that takes the form it's sprayed on. It's the same material that is used to make the disposable coffee cup holders, they desinigrate if they get wet from water, but they hold up to the hot wax. You only need something to pour the wax/shavings mixture into, it can be anything I just use egg crates because I always have a few on hand. What a buddy of mine uses, is a cupcake pan. He packs the shavings into the cups, then he pours the wax over the top of it to fill the cup.
Len