The first metal can was produced in 1813 in Great Britain, and the can opener was not patented until 1855. For over 40 years, people relied on instructions printed on the cans themselves, which advised using a chisel and hammer to open them. This method was quite different from today’s standard tools, such as the rotary wheel, a modern version of the can opener, which appeared in 1870. The can opener is now so closely associated with the can that many assume it was invented at the same time for the same purpose. However, the timeline tells a different story. The history of the can began in 1810 with a patent by the British inventor Peter Durand, who proposed preserving food in metal containers. Two years later, in 1812, Bryan Donkin acquired this patent and quickly put it into practice by starting the first cannery in the world in London in 1813. This marked the beginning of the canned food industry, which rapidly spread across Europe and the United States by the early 1820s. However, these early cans were very heavy and made of thick metal, making them difficult to open with simple tools. To address this challenge, manufacturers included instructions on the cans themselves, advising users to cut the lid near the edge using a chisel and hammer. This method required careful tapping along the lid’s edge, which was more suited to a workshop than a kitchen. The advantage for manufacturers was that no new tool was needed, and the method was straightforward. This approach remained in use for over 40 years, from the first cannery in 1813 until the first can opener was patented in 1855. The first can opener patent was granted in England in 1855, and another followed in the United States in 1858, designed by Ezra Warner of Waterbury, Connecticut. Warner’s device used a sickle-shaped blade to cut the lid like a saw. The U.S. Army adopted this tool early on, showing that the can opener found its first use in military settings. In 1870, the rotary wheel can opener was introduced, marking a significant advancement in design. From the first can opener in 1855 to the rotary wheel in 1870, only 12 years passed, showing how quickly innovation followed once the idea was introduced. This timeline challenges the common belief that inventions come with their tools, highlighting instead a 57-year gap between the first can and the rotary wheel that eventually made opening cans much easier.