Using the NUK Thermo Express Bottle Warmer is quite simple: fill the right amount of water for the bottle or glass jar into the appliance, then, with the help of the basket put the baby food into the bottle warmer. One push of the button and the appliance warms baby food to the right temperature, quickly and gently with steam in just 90 seconds*. The integrated light indicates that it is warming. As soon as the filled quantity of water has evaporated, the appliance automatically switches itself off. The NUK Thermo Express Bottle Warmer is suitable for all standard baby glass jars and bottles.