SOURCE Product Reviews (Page 9)
I love mine. Very versatile and lasts forever.
1) here in the U.S., infortunetly we use chlorine and fluoride among other chemicals in our public tap water for "cleansing" agents. This is the water with which I filled my bladder. 24 hours later, it really tasted like those chemicals because it sat stagnant in a sealed bladder. I would not recommend tap water unless it is to be cycled through the bladder within 24 hours.
2) I used regular bottled filtered "spring" water. This I would also not recommend. After I popped open the bottle and let oxygen to it, it also tasted like chemicals. However I did not taste too bad 24 hours afterwards. It took almost 48 hours after filling bladder to start tasting horrible(just a little bit better than tap from U.S.)
3) I'm not sure what countries have access to water from a company of which calls their water Penta water. It was the best performer in this bladder. I left Penta bottled water in my bladder for 8 days and it still tasted like the water I put in there from day one. No change in taste. I am not advertising for Penta.