New Delhi, July 7 -- Optical illusions are more than just fun. They trick the brain in unexpected ways. One recent illusion that has caught attention features dozens of bottle caps. At first glance, all caps look the same. But look again. Among many "Banquet" caps, there is one that says "Coca-Cola". Can you find it? This visual puzzle is a test of focus and patience. Your eyes may skip over the odd one out. That is what makes it so tricky and fun.

The image shows rows and rows of red bottle caps. Each one is marked "Banquet" in white script. But hidden in plain sight is a single Coca-Cola cap. It features the same colour and shape. Only the logo is different. Your mission: find the Coca-Cola cap as fast as you can.

This illusion works ...