This easy bottle warmer with two programs from Chicco can be used in the home or car. There is a cigarette lighter adapter for the car when on the go. The bottle warmer signals with both light and sound when the feeding bottle is warm and ready for use. A practical leaf is included for the heating of smaller bottles or glass of food. The bottle heater is designed to warm the milk gradually so it can preserve its nutrients. The warmer can keep the food warm for approx. 1 hour. The following amounts of water must be used when using: Approx. 130 ml water to a bottle of 150 ml contents, approx. 150 ml water to a bottle of 220 ml contents, approx. 220 ml water to a bottle of 330 ml contents.