The package price also includes a non-alcoholic beverage.I usually book the F! package at Mama Melrose and you can pick any entree plus any app or dessert on the menu. You may be thinking of the Rose and Crown fireworks dining package at Epcot which has a small prix fixe menu. I actually have the F! package booked at Prime Time Cafe in May for a change
Generally non milkshake though FWIWThe package price also includes a non-alcoholic beverage.