The Egg Cuber is an easy-to-use tool for making hardboiled eggs square. Just pop a peeled, still-warm hardboiled egg into the square cup, put on the lid, and crank down the "cubing plate." It will squish the egg into a nice little cube shape. Allow the egg to cool, and when you take it out it will be a nice, room-temperature hardboiled egg, shaped like a cube. (By the way, each egg takes a couple hours this way.)
What's that you say? You prefer your eggs egg-shaped?