The Perfect Prep Day & Night Machine preps your baby's bottled water to the right temperature in 2 minutes with added features specifically designed to make night feeding easier. The machine is suitable for most brands of formula milk and has an adjustable base to accommodate different bottle sizes and shapes. How does the Perfect Prep Machine work? Scoop your desired amount of baby formula into a baby bottle and place it in the Perfect Prep machine. An initial 'hot shot' of water at 70°C is then dispensed killing any bacteria that may be present in the formula as well as helping to dissolve the formula quickly and easily. Give the bottle a quick shake, then place it back under the dispenser to be topped up with cooler water. The built-in filter system removes impurities from the water, and the touch-sensitive button dispenses the right amount of water needed from 113gm to 311gm's You can even adjust the volume.