What is a bottle sterilizer?

Answer 1

In the context of child-care - it's a container (usually clear plastic) that the user fills with clean tap-water. The bottles are placed in the container - and sterilizing tablets or fluid is added. The bottles are left to 'soak' in the sterilizing water for a time determined by the manufacturer of the sterilizing product, before being rinsed in clean water prior to use.