Traditionally egg-timers were small hourglasses[1] and the name has come to be synonymous with this form.[citation needed] As technology progressed mechanical countdown timers were developed which had an adjustable dial and could be applied to a wide range of timed cooking tasks. Most recently digital timers have also been manufactured and a wide selection of software is available to perform this task on computer or mobile phone. The task is simple to perform on most microwaves and oven timers.New products have been developed which potentially allow for better egg timing; these use the temperature of the water in which the eggs are being cooked to indicate the cooking state of the eggs. This kind of timer has the potential to more accurately indicate the state of the egg while it is being cooked as they do not rely oncertain conditions (water hardness, hob temperature, atmospheric pressure)One such product is made of translucent plastic with a heat-sensitive coloured disc in the middle which changes colour at 80 degrees Celsius.
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