I have one without the filter, but it's not as good, IMO. (No real movement in the bubbles.)
IMG_8515 | Flickr - Photo Sharing!
This was tequila (I don't really know why there are even bubble to begin with, but oh well) straight out of the freezer. I think on this one (link), it was just still too cold for the bubbles to start flowing to the top, where on the later one (star filter) it had warmed up some. Exposure time was (I think) the same for both of them.
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Yeah - about star filters... I certainly see what you mean, and usually I don't like them either. For me though, it just seems to work here. Personal opinion, of course.
I don't use it much outside of Christmas, lol!