Ha ! That is funny that people get nasty about it. We have that issue everytime my DH and I go out to eat. He is a die hard Coke person and I can't live without my Diet Pepsi..okay, I can, but it isn't pretty ! I used to "suffer" through our 10-day WDW vacations on Diet Coke until I discovered garden grocer delivery to WDW. Now if we are going on a longer trip, I make sure and order plenty of DP along with water and other things. If we are on a "quick" trip of only a couple days, I just suck it up.