Rocks, No Salt

In 1955, through-the-door dispensers for water and ice weren't yet a gleam in an engineer's eye—but someone at Westinghouse was on the right track. At the press of a button, your chosen beverage concentrate was blended with 'just the right amount of cold water and air' [air?] and streamed right into a waiting glass. I'd bet that in an adult-only household, the fountain reservoirs might be filled with more potent liquids...on a closer look, doesn't that green solution bear a slight resemblance to margarita mix?