Normally, the idea of buying a water bottle that arrives with a burnt stick in it would have us jumping on the class action lawsuit bandwagon (Hello, expedited student loan payoff!) But the lump you'll find in this Kishu BottlesUp Glass Water Bottle ($30) is a unique form of Japanese charcoal known for its completely natural water-purifying abilities. Put it in a water bottle and the kishu immediately starts absorbing impurities, trading them for a host of healthy minerals. It lasts for six months, and once it's spent, can be added to the compost heap. You can't say that for a Brita filter.
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