This is a type of lighting device that has a wick and uses oil as fuel. Lamps are made of earthenware, celadon, white porcelain as well as metals including iron and brass, or even jade. There are various shapes of lamps including liquor vessel, sauce pot, bottle, soup bowl, and cylinder. These lamps are fueled by plant-based oil including sesame oil, soybean oil and castor oil, or animal-based oil such as lard, beef tallow, and fish oil, and generally stood on a lamp stand. Twisted cotton or paper was used to make a wick. Some wine glass-shaped lamps were as big as a temple lamp. Calabash lamps are suitable for highly inflammable fuel and have two wickers with a cover. Sauce bowl-shaped lamps made of white porcelain are Korean traditional lamps, and they have no foot with their wicker in a soak of oil inside.