A mind-twisting water puzzle is challenging people’s logic — are you getting it right?

At first glance, this looks like a simple visual challenge designed to test basic observation skills, but it has confused thousands of people online. Four identical glasses are placed in front of you, each filled with water up to the same visible level.

Inside each glass is a different object, and the question seems simple: which glass actually contains the most water? What makes this puzzle so interesting is that the answer is not about appearance alone, but about understanding how physical space works.