I've been seeing these at my local comic shops
their round coasters like you'd find in a bar , they advertise New Marvel series Coming Out

So Far I've seen :
Wolverine / X-Men
Avengers vs X-Men

I'm not sure how many different ones there are to collect , I've just seen the 2 different ones so far..

"I have a couple extra's of the Avengers vs X-Men coaster for trades"

Hey Kevin,

I don't want to step on your post, but I just posted this pic in another part of this forum.
The picture is self explanatory.
So far it's the only one I've seen over here in RI.

Fred

I've had these since 2011. They are all the same, top row front, bottom row back.