Here's another vote for the Tupperware container.
I've used one for over 30 years to keep new and spare leftover decals. Many a project has been enhanced by the use of an instrument face, stripe or number that I pulled from the "burped" container.
Regarding dessicant packs. When you purchase some, get those that can be reused. While Virginia isn't Florida, humidity can be bad here. Dessicant packs occasionally need to be "recharged." I haven't used any for awhile, but I've used the kind that can be put in an oven, dried out and reused. I assume those are still available.