I recieved this water bottle/filter as a gift, and am unsure of the quality. The brand name is stansport, and is labelled as made in the USA. It claims 2 micron filtration, and says it was tested by "state & epa reg. laboratories to EPA, ANSIINSF (Std 53) Protocol. It claims 99% reduction in Crypto, Giardia, lead, chlorine "and more". Would this be a good choice to take to mexico? Would it protect against viruses? Thanks in advance for the help. --Ian