Dear Friends: I am just now trying this dripper. Filters were not available at this time. I happen to have Hario #2 and #3 filters, they can just be folded once and then opened out, just like with the CHEMEX system. So, there's more paper on one side of the filter than the other. The #2 filter fits very neatly, the #3 sticks up a little but is also fine. I often just want a single or even a half serving of coffee these days, and the new device suits this very well. It's very good looking thing, a thoughtful design. It's easy to use as they say, and I think there might be a slight improvement in the result. I only heard of CAFEC recently, but now I'm really interested in them.