Originally Posted by
flyerCO
I could be wrong, but i thought DL prefers 1, but allows an FA to use discretion to serve 2. Allows 2, doesn't mean that if a passenger requests two they have to be served two. Some think that because DL will allow 2, they have to be given 2 if they ask.
I'm not a FA, but from my understanding it's based on the customer request (double=2, regular drink=1). I've never seen a customer be denied a double when requesting one in any cabin.