During a conversation with one of my crew, water purification came up. We got on the subj of chemical purification and the taste of it. I mentioned that GI's put frozen strawberries in the Lister bags to hide the chemical taste in the field. He mentioned that he carried the individual packets of Koolaid and Crystal Light packets to do the same thing. D'uh, so simple , like the Jitterbug, it plumb evaded me until then. Anybody else doing this?