Mission accomplished!
Brain teasers, puzzles, and challenges like this one are incredibly popular and an excellent way to exercise the brain. Finding the solution can be quite difficult but with a bit of focus and analytical thinking it can be done. The solution is: the cup 2!
Congratulations to those who solved it and for those who didn’t, don’t give up! Solve other puzzles and challenges on https://www.abmeyerwood.com/ to keep your brain active.