Bobble Water Bottle Mini with Water FIlter by Karim Rashid. A mini version of the Bobble water bottle, great for kids or carrying on the go. The reusable bottle filters regular water as you drink it, meaning that you can have great tasting water on the go with little cost and wastage. 1 bobble filter is equal to at least 300 water bottles! The carbon filter removes organic contaminants from regular tap water and meets or exceeds NSF International Standard 42 for chlorine, tasteand odour reduction. For best results change the filter after 2 months use or 150 litres of water.