This product does an excellent job of cleaning the water we drink with little care and upkeep. I used to fill up gallon jugs at the water store and lug them home. Now I get all my filters delivered to my home! After reviewing how clean the filters get my water I also bought the travel water filter bottle and it's great for all my needs when I'm on the road as well as flying and traveling overseas. After comparing Zero Water with the rest of the gravity feed filters, Zero Water is the cleanest of all.