Filter Water Bottle of 550ml with Replaceable Carbon Filter, Replace 300 Bottles of Fresh and Clean Filtered Water FDA Approved and BPA Free with Improved Bottle Design, Inbuilt Tethering Ring with Quick Fit and Release Karabiner Easy Fit Carbon Replaceable Filter Supplies 40 Gallons or 150 Litres of Filtered Water Reusable & recyclable bottle Refill Filter. Save Money.Repeat.