Products Inside Mechanicals
Good-quality mechanical pencils with product advertising on them used to be given out by salesmen. But some of these advertising pencils went further, containing visible samples of actual products inside them! There were different pencil styles as well as a surprising variety of products —
By observing these items, I learned what sorghum, soy, and chick mash look like. I can also now recognize Mineral Jig Concentrate if I ever come across it, although I have no idea what it is.
I had more samples of liquid products, but many of them leaked out or turned to sludge.