Natural steam sterilisation: 99.9 Percent of harmful germs are killed, without using chemicals Large capacity: Four Avent bottles can be sterilised at once Time saving: Products are sterilised in just 2 minutes, simply add water and place in the microwave Space saving: Fits most microwaves (dimensions: 28 x 28 x 16.6 cm), convenient for travel Multi-Use: The steriliser can be used for breast pumps, soothers and other products, as well as bottles The microwave steam sterilizer can be used to sterilize baby bottles and other products in just 2 minutes, killing 99.9% of germs and bacteria. The exact length of the cycle depends on the wattage of your microwave, of course. 2 minutes at 1200-1850W, 4 minutes at 850-1100W, 6 minutes at 500-800W.