Blue Bristles on Toothbrushes
Blue bristles on toothbrushes aren't just for the aesthetic. The blue dye actually wears off on the bristles when it's time for you to get a new toothbrush. Since nobody really knows when the right time to change the brush is, it tells you itself!
The Hole in a Pasta Spoon
The hole in your pasta spoon isn't just there to be annoying. It actually measures out one perfect serving of spaghetti. It's always so hard to judge what the right amount of pasta is for one person, so the spoon does it for you.