a device for serving sweet, fizzy (= with bubbles), non-alcoholic drinks, and sometimes also ice cream and other sweet things to put in them

Inside the quaint Pharmacy, step into America's past with red plastic swivel stools round the old-fashioned soda fountain. 在古色古香的药房内，红色塑料旋转凳围着老式苏打水机的画面让你仿佛回到了美国的过去。

the counter and equipment where sundaes, milkshakes , ice-cream sodas, etc. were served

She spent most of her teens hanging out at the local soda fountain. 她十几岁的时候，大部分时间都是在当地的冷饮柜台消磨时光。