A small cube composed of a stack paper with adhesive down one side to hold them together until the top one is written on and ripped off.

The inherent problem with this invention isn’t a design flaw, it is a complete and utter failure to understand human nature. The Cube’s failure is evidenced by this fact: just because you wrote your shopping list on one doesn’t mean that you’ll be able to find the damn thing once you’re ready to hop in the car.

The invention of the Post-It (a traditional Memo Cube with adhesive on the the backs of the individual sheets) did not solve this problem as expected--instead of reducing the number of ways they could be lost, Post-Its could be stuck in more obscure and forgettable locations. A note being ‘somewhere in the kitchen,’ could now, thanks to the wonders of glue, be ‘on any wall, floor, ceiling or flat surface in the house, plus all the places it could be if it got stuck to the cat.’

The Memo Cube is one of the most popular 'labor-saving' devices in the world, which is odd considering how little labor they actually save. It's just one of those things that are impractical, a waste of raw materials and no real help in the long run that, despite all of this, will never become unpopular.