I suppose the cocktail has undergone a symbolic status change. In the 2000 Sex in the City cosmopolitan era, cocktails symbolized going out and having fun. Nowadays, they seem promoted more like a luxury relaxation symbol, akin to the "woman in a spa with a hair wrap" or "dude on a lush golf course" image in ads.
Here's another ad equating cocktails with relaxation and vacation. It's not the first time we've seen an airline promote cocktails, and the cruise lines are into it also. And blue seems to be a popular cocktail color in ads these days.
Camper's Book: Tonic Water AKA G&T WTF is now available for sale.