Plus, there’s no way one is going to use all that candy for one cup of coffee - it amounts to a fair quantity of sugar. So what happens with the now wet, dripping remains? Does the soggy mess go to the next customer, or, more likely, wastefully thrown away? What do you do with it, in between deciding you now have enough sugar, and finishing one’s coffee?
It’s a nice visual but really impractical in every way.