mistoffelees, the old way is pouring the syrup into a glass, then adding carbonated water to the glass, and mixing with a spoon or swizzle stick. I think that there are some other flourishes and techniques, like maybe allowing the carbonated water to flow down a spoon or stick so it doesn't splash. Most places mix the two inside the dispenser, so what goes into the glass is already mixed. The photo shows that clear carbonated water is being poured into the glass.
Unfortunately, the current syrup doesn't contain all the original stuff the guy was asking about.