Cracking the mystery: How many teeth does a soda bottle cap have, and what is the reason behind this exact number?
The familiar 21 ridges on glass bottle caps are the result of over a century of engineering. Initially, William Painter's 24-ridge design damaged bottles, but after extensive testing, 21 ridges were found to provide the ideal balance for sealing, production, and ease of opening, becoming a global standard.
The familiar 21 ridges on glass bottle caps are the result of over a century of engineering. Initially, William Painter's 24-ridge design damaged bottles, but after extensive testing, 21 ridges were found to provide the ideal balance for sealing, production, and ease of opening, becoming a global standard.
