| http://www.w3.org/ns/prov#value | - In fact, one of the main reasons I am writing this review is because I noticed a lot of people were concerned about the filter quality because trace amounts of charcoal were noted in the bottoms of containers after drinking.I was concerned about this myself, until I did some research into what function the particles actually serve... they are activated charcoal/carbon particles, which is differen
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