Gather around children and hear my tale of years yonder when music was consumed on physical media. The primary form factor of the late 1990s through early aughts being the Compact Disc or CD. These fragile plastic discs came in a protective shell of even more fragile plastic that was designed to shatter while attempting to remove the protective plastic film that wrapped the shell. So the device seen above was invented to slice open this plastic film in hopes that you could retrieve your CD without anything breaking.
The particular example above came from my short stint at Napster after they had been shut down by the courts, but before they filed bankruptcy and sold everything to Roxio.
I’ll have to check if these work on Blu-Ray cases before those go obsolete as well.
Alcohol content: Pliny (beer)