It's just diet soda, just like stegosaurus soda. If it is not a sweet drink, it can be served with honey grapefruit sauce or honey lemon, honey aloe and so on. Or add passion fruit, or mix some juice drinks or even alcoholic drinks. But some homemade sodas in western restaurants are delicious, such as grapefruit sodas, kumquat lemonade and so on. I don't know which one you are talking about.