Other - What are the little wax paper bags really used for?

[Nahbus]

The little wax bags that have stamps on them.. about 2" x 3/4" - what are they really used for, out of curiosity?
I once heard they were for culinary, but searches don't bring up much.
Do they hold powders for cooking? For science?
Where would one go to look for them?

[china cat]

Always thought they were for people who collected stamps?

[Nahbus]

Ah, yeah. They're called glassine bags. I guess they're used for all sorts of things and come in a wide variety of shapes, sizes and colors.
Thanks