Easy and fast sterilisation anywhere, any time! Philips Avent microwave steam steriliser bags are a quick, easy and effective way to ensure you always have sterile baby bottles and products, wherever you are. With each bag, bottles can be sterilised in the microwave in just 90 seconds.Each microwave steam steriliser bag is proven to kill 99.9% of germs and bacteria. Each reusable microwave steam sterilising bag can be used to sterilise bottles, breast pumps and other baby products in just 90 seconds*. Each bag includes a tick box. By ticking the tick box you can quickly and easily keep track of the number of times each bag has been used.