The Dr Browns Microwave Steriliser, is a convenient way to sterilise up to 4 Dr Browns Anti Colic Bottles in one cycle of approx. 8 minutes sterilising time, plus cooling. The unique custom molded tray allows easy positioning of the teats and vents. Steam heat effectively kills all common household bacteria. The Dr Browns Options + Microwave Steriliser pack includes 2 x Dr Browns Anti-Colic 270ml Bottles which offer an easy and comfortable way to feed your little-one, adapting to their needs as they grow. With the unique design, this bottle can be used with or without the removable internal patented vent system, transforming it into a teat-vented bottle for more convenience. Use Dr Browns Options + bottles from birth dont wait until your baby develops colic. The unique internal green vent system continues to create 100% vacuum free feeding, which is clinically proven to help reduce wind related colic. This is what makes Dr Browns the number one choice of UK Health Professionals for the relief of colicky symptoms. The breast-like teat shape is correctly contoured for a proper latch and a more natural bottle-feeding experience - perfect for switching from breast to bottle and back again! Each teat is specially engineered to offer the same consistent, natural flow, so you and baby know what to expect in every feed. As babys feeding becomes more developed the bottle can be used without the green vent system to work more like a conventional, teat-vented bottle. The complete feeding system that grows with baby and helps alleviate the symptoms of windy colic. Prevention is better than cure!