Some kitchen stores are a freaking gold-mine of r/ofcoursethatsathing material. Do you need an avocado slicer and accompanying special avocado container for the leftovers? No? How about a butter cutter? Or my favorite, the pizza cone?
Links are all to Amazon but are based on photos I took one day while thinking about this sub. That pizza cone haunts my dreams.
Hands down, the Butter Cutter.