I always seem to have lots of odds and ends of soap - I like the Lush soaps but I cut them into smaller chunks so I can have lots of different "flavours" on the go for variety, and when they get really teeny they're quite hard to use. They don't stick together very well because they're different textures so I don't think a soap mould to form another combined bar would work.
I recently got one of these to try - a sisal bag that you can pop several small pieces of soap in and it then acts as a self-soaping sisal scrub. It's great but after just a few washes the "knit" of the bag is coming undone in places and it's going to fall apart pretty quickly. If it wasn't for that flaw I think I'd have the problem solved! Has anyone else got any good ideas or products that they use for the last odd pieces of soap?