Product review (1 stars): Not worth your money.
Bought a two pack, and the first one seemed to work okay, lasted a few months, tasted fine. The second one doesn't work at all. The water has an after taste like if you left your water glass sitting out overnight. This hasn't gotten better leaving it in for a week, and we drink a good amount of water. Extremely disappointed. We haven't had any trouble with off brand in the years we've bought them, but the one we used to get is no longer available.