I've never seen one in person, but the idea of it is to have a really small lightweight bag, right? If so, there's a little ching bag with a clamshell design. It's small, only holds a handful of discs with a small zipper pocket inside and two mesh water bottle pockets on the outside. It's a solid little bag, and is great for that number of discs.
I had the option of the Nutsac for 50% off or the Ching bag and I went with the Ching for my first DG bag. It's starting to wear thin after a year of play but it hasn't started to fall apart yet. I use one drink holder for a tall water bottle and stuff the other side with snacks. I like it because it's light, holds just enough for a round or two, and has helped me keep my disc count low during my first year of play. I stuff about 8 discs in it comfortably.
I need to look for a slightly larger bad for next season. Something that holds 10-15 discs, has room for water, snacks, rule book, camera, flashlight, towel, etc. Recommendations welcome.