While I was going through stuff at my parents' house, I stumbled upon a collection of plastic cases that I used to store my N64 cartridges and instruction manuals. They were stamped with "Nintendo 64" in red on the bottom of the front.

While I'm sure they're absolutely worthless (hence why this isn't in What's It Worth?), I would like to know how common these plastic things are. I remember buying them in sets of three to store games whenever I bought new games, but about a year into the N64's run, they stopped selling them.

So did other people buy these? Were they common? Do people still use them?