The Express Microwave Steriliser gives you the same benefits of steam sterilisation using the power of your microwave. Just add 200ml of water and heat in the microwave to sterilise up to 4 AVENT bottles and accessories in under 8 minutes.Sterilisation times:* 4 mins for 1100-1850W microwaves* 5 mins for 850-1000W microwaves* 8 mins for 500-800W microwavesThe specially designed rack will take the ISIS Breast Pump and the compact design and clip-on lid make it ideal for travel. Cleaning is easy too as the unit is dishwasher safe