Bottles often had round bottoms prior to the invention of the metal bottle cap to prevent upright storage
The crown cork was the first highly successful disposable product (it can be resealed but not easily). This inspired King C. Gillette to invent the disposable razor when he was a salesman for the Crown Cork Company. The firm still survives, producing many forms of packaging.[1]
Prior to the invention of the crown cork bottle stopper, soda bottles had ordinary cork bottle stoppers and often had rounded bottoms so they could not be stored standing upright. The reason for this is corks have a tendency to dry out and shrink, which allows the gas pressure in the bottle to cause the cork to "pop." Storing bottles on their side prevents the corks from drying out and "popping." After the invention of the crown cork bottle stopper, this problem was eliminated, and soda bottles could be stored standing upright.[2]
Crown corks are collected by people around the world who admire the variety of designs and relative ease of storage.[3][4] Collectors tend to prefer the term crown cap over corks. In Mexico, these are called corcholatas. In Spain and South America, the names chapas or chapitas are used. (In northern Chile, the name calas is used.) In the Philippines, the term tansan is employed.
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