Really, there are so many "causes" of bloat, but we still don't know for sure why some dogs who do everything right, still bloat. Alot of people think it's genetic, or genetically predisposed I guess you'd say. We know for sure that excersise after eating plays a huge part in it, etc.
To me, especially with a giant breed, it's common sense that it's more comfortable to have their bowls raised. To feed a great dane off the floor is the equivalent to us standing on our heads and trying to eat, you're going to ingest a heck of alot more air that way than you are sitting at the kitchen table eating normally right? Well it's the same for dogs. Not to mention it's probably painful to hang your head that low and try to chew and swallow basically upside down. So Luke's bowls have always been elevated.
I just use a plastic storage container. I need to get a taller one though. I was going to spend the money to buy a real one, but why bother when you can use something in the home that works just as well.