An Odd Jar Opener
There have been a number of methods to open a jar throughout human history, but this may be one of the strangest. In fact, it’s so strange that we aren’t sure how anything like this would function. Seriously, you’re looking at a jar opener.

Maybe the side with the teeth is good for prying open jars with notches, such as peanut butter? That would be our best guess, but we don’t claim to be experts.