A manual can opener is a handheld tool designed to open metal cans. It typically consists of a rotating cutting wheel and a handle. To use it, you place the cutting wheel on the can's edge, squeeze the handles together, and turn the handle to puncture and cut through the lid. These can openers are often made of stainless steel and plastic, making them durable and easy to clean. Unlike electric can openers, manual versions do not require batteries or electricity, making them a practical choice for camping or emergency kits. They are also lightweight and portable.