Here's a method of roach smoking/saving that I heard of many years ago. Some of my dealer friends used to do it in the early 70's.

Save the roaches in a glass mason jar, labeled "MING I". After you get a joint's worth of roach pot, roll it up and smoke it. Take that roach and put it in another jar labeled "MING II". Keep putting your second generation roaches in the II jar, and then repeat the process with these and save them up as third generation "MING III" roaches, and it can go on from there. It would be nearly impossible for any one person to progress much past MING VII or VIII, though.