Coffee Machine Cups Indicator

In my household we always set up the coffee maker the night before, but after one too many times of it being set up for an undetermined amount of cups and ending up with over or under extracted coffee in the morning when someone else turns on the machine, I decided to design this cute little coffee cup indicator. Simply set the indicator to how many cups you've set the coffee maker up for, and that you've set it up; and then whoever turns on the coffee in the morning can just flick the indicator