There comes a point that I stop arguing with customers and give them what they ask for, which obviously turns out not to be what they want. There was this one time a few minutes from closing that someone ordered an iced coffee with whipped cream on the bottom and top. The thought of having to explain to her that the whipped cream would simply float and/or dissolve exhausted me so much that I just gave it to her in all of its nastiness. Customers got us trying to defy the laws of physics