I think everyone's got their local name for this sort of device, just like everyone's got their share of unique names they use for buds. Back in the days when parents were frequently around and I was just a little highschooler we had a drink name for everything we did... weed was Pepsi, ether was Dr. Pepper...

Yours has the individual touch for having twin carbs. The basic idea is still that you can only make so much smoke from a single inhalation, so concentrating multiple inhalations worth of smoke inside a bottle and then hitting it all in one go gives you the wonderful overwhelming power hit. I've heard the term Nader before, although I don't remember where (big surprise). Good idea for what to do with the end of a blunt, if I do say so myself. I HATE leaving roaches laying about (although my friends do, and then collect them for one last smoke when the bag runs out). I stick em in a pipe's hole and finish em off on the spot. The Nader sounds more fun for a party situation though, I will have to try making one