A father and son in the mix plant business in Green River, Illinois, had been experimenting with a soft frozen dairy product for some time.

• 这种食品是由一位父亲和他的儿子在伊利诺州青河的一家小作坊里制作的，这俩父子试验这种软凝固乳制品已经有相当长一段时间了。