The faucet is there for illustrative purposes. It's only about the drop of water?
None will get filled.
It's a closed system; that one drop goes into the first cup. 😉
I feel smart now.
Discussion
If you assume that the disconnected faucet will keep pouring water, you can assume a lot of things. Maybe there's a magnetic field & the water has metal in it? Maybe the image is upside down? 🤷♂️