For a typical burger and fried chicken shop, we recommend the standard 3-valve model, which can simultaneously dispense three mainstream carbonated beverages: cola, Sprite, and Fanta, covering over 90% of customer flavor preferences. If the store primarily serves younger customers or children, upgrading to a 4-valve model allows for additional options such as orange flavor or sugar-free cola. For small family-run shops or food stalls, the basic 2-valve model is sufficient to meet core flavor needs.