The Perfect Prep™ unit contains a probe that measures the temperature of the water in the tank and prevents the unit from dispensing if the water is above 25 C. This is a key safety feature to ensure that the final feed is not too hot. Specially designed to make preparing bottles quicker and more accurate, Perfect Prep™ gives you the extra peace of mind that comes from knowing your baby's bottle will be perfect every time. Breast milk is best for your new baby, but if you are making the move to formula milk, Perfect Prep™ is everything.