Riddle: Can you find which cup of coffee get filled first?
Answer: Red dots indicate that the pipe is blocked. Cup number 9 is blocked even it happens at the edge of the pipe.
The only free way for coffee to flow in the cup is to cup number 5.
So the cup 5 would get filled. But this is not for sure. It depends on the amount of coffee.
In the system, there are four deposits and the pipes which need to get filled before the coffee to go and fill up cup 5.
Supposing that the pot has coffee for all four cups, it is not enough because it must fill the containers and the pipes and no more coffee is left for cup 5 to get filled.
The most accurate answer is that none of them get filled.