Plastic food containers. Square or rectangular.
Why are they one of my favorite organizing tools? Because they are affordable, keep a category of items together, reusable, and also are fun to play with. They were a better source of entertainment for my daughter than her toys.
I’ve used plastic food containers in my pantry as a container for a category of small items, for craft supplies, on the workbench, as junk drawer dividers, in the bathroom, and in my office.
What have you organized in a plastic food container?