Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Just Boil and forget all these overpriced fancy items
Review: Boiling water will make 100% of fresh water drinkable 100% of the time. Just boil. These things are overpriced and for the price do not provide nearly enough drinkable water, especially considering you can boil it for free. Get a 1 burner propane burner for 15$ and have all the drinking water you want using 2$ propane tanks that will boil 50-100 gallons before goin empty.
