How do you store your plastics? I've amassed enough that I need a solid and cheapish way to keep them sorted.

Years ago they would melt when left in Plano boxes. I bought a big southern crappie set that came in a Plano box. I guess this is no longer an issue? It would make it easy, but I don't want boxes of melted plastics. The folders are expensive to keep everything OCD organized though.