From Craig At Zing Discs:
The Microfoil was developed as a smaller disc that would fit into the older Disc Golf Bags. It is a fun indoor mini that is light enough for small children. This disc fits inside the Snipe and Cozmo to make a container set. It fits perfectly in your hand as well as in your back pocket for the casual Disc Golf player who does not carry a bag.
Specifics: Disc Weight: 25 grams, 3.75diameter (mates with Snipe/Cozmo)
All minis are random color/ Foil combination