Their formula was as cheap as possible and they suggest it be refrigerated, I never did and it seemed to be ok. I make my formula way more powerful and way more expensive than their syrup method and my formula should last long enough. Their syrup formula is black and taste so bad to some people that they can't hack it, I didn't mind it when sick, but couldn't take it if I was well because of the taste.

Their method is fine, cheap and easy and everyone should have 5 gallons per adult in a glass water jug as Dr. Christopher suggested to prepare for what was going to happen in the next 50 years. We are getting closer to 50 years since he said that!!!

MH