I fucking hate the way peanutbutter jars are designed. If its more than half empty, your hand will have a messy,greasy peanutbutter residue on it from the edges of the jar when you stick your hand down there with a butter knife.
Fuck that shit!
A peanutbutter jar should be designed to be wider, shorter, and the neck should be flush with the inside of the body of the jar so you can scrape it more easily with a butter knife.
I would eat peanutbutter twice as often if I knew I wouldn't get any on my hands.