There is only root beer left with some melted vanilla ice cream. You don’t waste your time spooning that to your mouth. Instead, you lift your glass and swig it down.
Imagine you can re-create that end-of-root-beer-float phenomenon without having to do all of the work of spooning a bunch of bites with mostly vanilla ice cream and a hint of root beer?
Now you can. Buy Vanilla Spice Egg Nog, your choice of root beer (most brands work), and pour together in the same glass. Boom.