Bring to a boil, only boil on a rolling boil, add to boiling water, put in a steamer, must add vinegar, set some timers....aaarrgghh! Don't stress over the humble boiled egg, simply place this colour changing egg timer in with your eggs, and whether you're simmering, or boiling on all cylinders, this little gadget will let you know what stage your eggs are at. The colour changes to signify when the eggs are at soft, medium, or hard boiled stage, also great for when cooking up a batch for different folks who like different yolks! Sits in the pan as your eggs cookChanges colourShows soft, medium, and hard boiled stagesNot suitable for microwave or dishwasher