that looks like an aquamarina filter,...they arent fake,..they are a charcoal based filter,...and they do work. They are however cheaply made and fragile(break easily).mcgeorge said:They have these little tube like ones for drinking out of streams. Although I wouldn't use it unless it was a last resort because some are considered fake and run about 10 dollars! The fake ones just have cotton in them to filter out particles. The real ones have cotton as well as activated charcoal in them. Some users say that they are both junk though and that they fall apart easy. Here is a photo of one.
[attachment=1:3uf5jdld]small water filter.jpg[/attachment:3uf5jdld]
I also picked up a new filter same filter I think, the one with the water bag connection. It is 0.1 micron which isn't as low as my other larger sawyer 0.05 micron. Reason for replacing is that the outer casing is cracked and I'm not sure if there is internal damage (clear plastic would be cool and useful on these things to determine if the ceramic is cracked.I just picked up a couple of the Sawyer Mini filters. Looks like a pretty good deal, 20 bucks per filter. The Sawyers looks to be a legitimate filter, yet it's bit of a hodgepodge with the filter, the mylar bag, the cleaning syringe and aplastic tube.
I am putting the mini Sawyer in the side pocket of my condor water bottle carrier along with the fish mouth spreader. What I'm setting up is a kit for water. Kind of along the same lines as a fire making kit. Except it will be a bottle carrier a filter a stainless 40 oz bottle with a GSI cup and a fish mouth spreader (so I can suspend the bottle over a fire).