I had an opportunity to use a Purificup filter recently, and I have to admit I am one happy camper with this product. I have really pushed the envelope by going to the pond behind my house, filtering a quart of water and then drinking it. Before actually drinking the water, I noticed that it was crystal clear, had no smell and looked good. The water tasted clean, and I didnt get the runs afterwards lol I really like this product, and I have recommended it to my group of fellow survivalist.
If you are in the market for a nice portable filter, give the Purificup Filter a chance I think you will really be impressed as I was.