Egg cookers

Egg cookers are used to cook eggs. Nowadays, modern, electrically run versions are most commonly used. Their predecessors would be simple water containers in which the eggs are cooked for a certain amount of time.
In order to prevent an egg from bursting, the large end of the egg should be poked with a needle so any air contained in the egg can escape.
An electric egg cooker is usually composed of a heater in which the water is boiled, an egg rack that usually holds 3, 6 or 7 eggs (depending on model) as well as a lid featuring a calibrated opening that regulates the amount of steam that evaporates from the and also doubles as a splash and heat guard.