I have this same tea filter, but its made by Teeli. It looks 100% like this. I bought it at 7,59€ from local internet store about year ago, and its still good.
http://www.teeli.com/englisch/products/index.html
I love this, its easy to wash, you can even but it in dishwasher. It fits perfectly in any cup, and gives lot of free space for tea leaves. And when you want to reuse the tea leaves, just lift the filter and put the cap under it, and leave it there. It doesn’t leak.
