The filling amount varies by size and model. Some evaporators can only use 80 or 90 ml. Other large equipment requires up to 200 ml to be disinfected as expected. The exact filling volume of your baby bottle sterilizer is described in the manufacturer's instructions for use or marked directly on the container. If this is not the case for the latter and you no longer have the instruction manual, you can easily research the recommended filling amount on the Internet.