Replacement filters for the Bobble bottle, compatible with any bottles in the range. Each filter is equivalent to the use of 300 single-serve plastic bottles. For best results replace after 2 months or 150 litres.The Bobble bottle is a revolutionary new design. Fill it up with regular tap water, and as you drink the water is cleaned by an activated carbon filter, removing chlorine and contaminants for tasty, crisp water all-day long. These replaceable filters each equate to roughly 300 single-serve water bottles. So while drinking healthy, fresh water, you\'re also drastically reducing your environmental impact, potentially removing the use of thousands of bottles over the course of a year. FeaturesReplacement filter for the Bobble bottlesActivated carbon filter - removes contaminants and chlorine from regular tap water.One size fits all Bobble modelsEach filter equates to 300 regular water bottles - for best results replace the filter after two months or 150L. Certified BPA-free, and free of harmful Phthalates and PVC Dishwasher safe