If you want to read mini CD or DVD drives without damaging your Mac, then you have to buy an external drive. Don't even think of trying to get it into your mac, even with the supposed mini-cd cases.
I got a mini cd with my usb controller (logitech) when i got my mac. I knew nothing so put it in. BAD IDEA. I had to reluctantly shake my macbook until it came out i was really worried about my macbook but it had to be done. I had tried tweezers etc before hand but that didnt work and i know i should have take it to the apple store but i was stupid. I was mainly worried about my HD!!!!