Have had or were offered milkshakes/smoothies/virgin frozen drinks as the DDP beverage at The Wave, Le Cellier, Grand Floridian Cafe and Sci Fi. Three places we were turned down were 1900 Park Fare, Sanaa and Yak & Yeti...all 3 of those said soda/tea/coffee only for the dining plan beverage. So I agree with the suggestion to just ask when you order...