Anti-Bacterial Filter Your Perfect Prep Day and Night is designed for use with water straight from the tap. The unique filtration membrane removes bacteria and other contaminants that can be found in water, ensuring your water is clean and safe to make a bottle feed, just like boiled water from your kettle. Guaranteed to remove bacteria These are genuine Tommee Tippee anti-bacterial filters for your Perfect Prep machine. We only recommend you use Tommee Tippee Anti-Bacterial filters with the Perfect Prep Machine. Do not use other brands of filters. The filter may look a lot like other water filters but inside is a unique filtration membrane to remove bacteria and other contaminants that can sometimes be found in water. Filter Warning System Watch out for the solid red light on the digital screen of the Perfect Prep Machine – it’s an early warning that you will need a new filter soon. The filter is expected to last up to 3 months.* For use with all Tommee Tippee Perfect Prep Machines Anti-bacterial filter designed for use with water straight from the tap The unique ultra filtration membrane removes bacteria and other contaminants that can be found in water Ensures your water is clean and safe to make a bottle feed, just like boiled water from your kettle. Each filter lasts up to 3 months* *Based on 6 x 9floz feeds per day Small particles of carbon may be in the bag or on the surface of your filter, they are food grade certified and pose no harm to your little one. The filters in this pack have been sterilised and are certified to food grade – please do not open until they are needed. This filter is intended to filter drinking water only. Do not put water of unknown quality into this product. Water is a food stuff, please use the filtered water within 1-2 days