In a household with a refrigerator labyrinth there is naturally in either case a labyrinth cup.
They are created by Gabriele Schubert from Reupelsdorf, which has amongst other things the labyrinth in her program. If you liked to have such a cup, turn to her. You may see more of her work on her website, to which I contributed my services … Link>
How does the milk arrive in the coffee cup? You may see that very well by tracing exactly the way (here the brown lines). One sees the goal also very well in the picture down here.