I stumbled across a useful, inexpensive drink holder on ebay the other day. I wasn't looking forward to drilling holes in the bulkhead, the suction cup models don't hold well and get stepped on, and the ones that clamp on to the rails don't help anybody not near a rail. This one hangs on the lifeline (or any other line, for that matter) and, because it hangs, doesn't need to be gimbled. The guy who sells them seems to be a pretty good guy. Beer is just too precious to spill.