A "fountain drink" is a beverage that you can get at restaurants or convenience stores from a machine called a fountain. It dispenses drinks like soda, lemonade, or iced tea, and you can fill up your cup with your preferred amount. Full definition
Prepared fountain drinks and ice cream items... preparing food. (livecareer.com)
Then my husband spent a day sitting outside a service station and counting how many people walked out with just fountain drinks. (inc.com)
From July 6 to September 27, regular 20 - ounce Coca - Cola ® fountain drink cups at all Cousins Subs locations will have a peel and reveal game piece with instant win prizes. (fb101.com)