Antibacterial filtration: The filter removes impurities, contaminants and bacteria. Standard water filters don’t include an antibacterial filtration membrane, so won't remove bacteria​ Compatible: Designed for use with all Perfect Prep machines ​ Know when a fresh filter is needed: Your machine will let you know when to fit a fresh filter. The original Perfect Prep machine has a warning light, and the Day & Night machines shows a message on the screen​ No need to use pre-boiled water: For added convenience water passes through an antibacterial filter to ensure it's clean and safe, just like boiled water from a kettle​ Prime before first use: Prime in cold water for at least 5 minutes before first use to remove air bubbles and any loose particles and ensure complete filtrationAntibacterial filtration_x000D_ Compatible_x000D_ Know when a fresh filter is needed_x000D_ No need to use pre-boiled water_x000D_ Prime before first useAdult use Adult use only. Keep out of reach of children.