Oil lamps are devices that use oil as fuel to produce light. They typically consist of a container for the oil, a wick that draws the oil up, and a flame that burns the wick. These lamps have been used for thousands of years, providing illumination before the advent of electricity. Common oils used include kerosene, vegetable oil, and animal fat. The design of oil lamps can vary widely, from simple clay vessels to ornate glass and metal creations. They are often used for decorative purposes today, as well as for practical lighting in areas without electricity. Oil lamps are also popular in candlelight dinners and camping for their warm, ambient glow.