Why do pax drink tomato juice on a plane and not at home?
<start thick passenger imitation> Off course I don't have tomato juice at home... look at the residue that it leaves in a glass. But I'll happily drink it where someone else is cleaning the glasses.
<end thick passenger imitation>
Well, if you're done with (artificially) sweetened drinks and you prefer something less sweet than orange or apple juice there is little left from the choice in the average beverage cart. Alcoholic beverages dehydrate and plain or sparkling water isn't very tasty either. That's the reason why I occasionally order tomato juice. (At home/work I usually drink hot tea.)