Safe Material: : Made of Food Grade Resin Without Any Harm To Your Health. The Pack Contains 4 Packs of Color Changing Egg Timer for Perfectly Cooked Eggs. There Is No Need To Guess and Get Frustrated. This Allows You To Choose How To Cook Eggs: Soft, Medium or Hard. Get Amazing Boiled Eggs Every Time . Simple Assessment: : As The Temperature and Time Change, The Color of The Egg Timer Changes From Red To White and The Color of The Egg Changes From Raw To Cooked. There Are Three Grades of Soft Medium Hard, and The Eye Can Judge The Maturity of The Egg. . Behaves Like An Egg: : The Cooking Aid Changes Color When Exposed To Heat. Thus, The Guude Egg Timer Reacts To Heat and Not To Time. This Means That The Egg Cooker Behaves Like An Egg In The Pot and You Get First-Class Results. . Heat Sensitive: : Monitor The Softness and Hardness of Your Egg By Different Colors At Any Time. Let The Egg Timer Sit In The Saucepan With The Eggs In Boiling Water. You Can Just Watch The Timer Change Color From Red To White As The Eggs Boil. Once The Color Has Reached The Desired Scale, Indicated By A Label and Line, You Can Remove The Eggs.