Want to have a perfect hard-boiled egg? Get this to help you, the Foolproof Egg Timer. Easy, just throw in the timer with your eggs and keep an eye on the color. As the eggs cook the timer darkens towards the middle, when it reaches the right line for you, your eggs are done to perfection. It has scales to show when eggs are soft, medium or hard by sensing heat instead of time. The sensor also accounts for the number of eggs, the amount of water, even the altitude at which the eggs are being cooked. The Foolproof Egg Timer is available for $9.

[via UberReview]