I've had lots of ideas on this subject. There are really 2 kinds of bags that you could use for bocks, one is a day bag, for meets with your bocks, pads/gear, and maybe some water/snacks for the day. The other is a travel bag for if you're going on a long trip or plane journey with your bocks. I've got the bag that Poweriser sells and its huge and has wheels and is a good first attempt at a travel bag, but its way overkill for a meet. I've also got a sports duffel bag that just barely fits a pair of bocks so its good for keeping in the trunk of my car as it doesn't take up any more space than necessary, but you can't fit anything else in it other than bocks and pads.
Day bag would probably be something small, maybe with a hydration bladder integrated. Bocks could just strap to the outside securely with straps rather than be contained in a bag.
Travel bag should be big, my current one can hold bocks, and enough clothes and other stuff for a week's vacation. It should have wheels, bocks are heavy and pulling them through and airport/subway/etc is tiring. A cool feature might be something like the wheeled tripod they have on golf bags, so the bag holds itself up to your hand height and you just have to pull it along. Lastly, my current bock bag is very bulky and has a really short handle, so even though its got wheels and i'm just pulling it along it always hits my leg as i walk cause its big and closer to me than necessary, so a long extending handle like rolling suitcases have would be cool.
