A kitchen essential in the U.K., this timer uses temperature instead of time to gauge whether an egg is soft-boiled, medium-boiled or hard-boiled. The tool absorbs heat exactly as an egg does, changing color from the outside edge to the center to display the level of doneness.

• Indicates progress of boiling eggs from raw to soft-boiled, medium-boiled or hard-boiled.
• Automatically adjusts to number of eggs and level of water in pot.
• Easy to use and extremely reliable.