[Lee Stewart]

In the early 1900s, it wasn’t easy to tell a Coca-Cola bottle apart from copycat competitors like Koka-Kola and Celery-Cola, so the company gave glass companies a challenge in 1915: Design a “bottle so distinct that you would recognize it by feel in the dark or lying broken on the ground.” A slimmed-down version of the winner, which came out a year later, became the iconic Coke bottle, and it’s now the most recognized bottle in the world.