(2 IN 1 STERILISER - With its unique safety vent technology, the Milton Combi can also be used in the microwave. 2) Pour 200 ml of water inside the container. 4) Microwave for 2 minutes. 2) With 5 litres of clear cold water, add 1 Milton Sterilising Tablet or 1 capful (30ml) of Sterilising Fluid.