We just bought a Gaggia Classic espresso machine. It came with 3 filters or pods. Two were easily recognizable as a 1-cup and 2-cup “standard” pod. The thirds one is still a mystery to us. There is neither description nor mention of it in de manual. It is the size of a 2-cup pod. Instead of the many holes at the bottom it only has one pinhole. I am attaching a picture of the standard 2-cup pod and the mystery one. Any help in identifying it and explaining its purpose and proper use would be a big help. Gaggia has never responded to my inquiries.