The Tommee Tippee® Perfect Prep™ Replacement Filter is designed for use with water straight from the tap for a safe clean bottle every time. The unique filtration membrane in the anti-bacterial filter 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.Key Features:For use with all Tommee Tippee Perfect Prep™ machines.Anti-bacterial filter designed for use with water straight from the tap.The unique 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* - We only recommend you use Tommee Tippee filters with the Perfect Prep™ machine.Pack of 2 filters*Based on 6 x 260ml feeds per day