Dishwasher clean/dirty indicator

Here's something different from the clean/dirty signs used to indicate the state of dishes in the dishwasher. Put this on top rack along with the dishes. The dishwasher has been run if there's water in the indicator. Dump it out when you put away your dishes--which may be easier to remember than flipping over a sign that's on the dishwasher door and can't be seen until you close it.

No supports needed if you print it upside down.