Jade cups were a type of precious ancient ceramic ware that was usually made of white jade, sapphire, porcelain, and other materials. Its surface is usually coated with a layer of lacquer to maintain its luster. Jade cups were often described in literary works as delicate, colorful, and shiny. It could be used to hold wine or drink water. As a high-end craft, jade cups were often used to express respect and gratitude to guests.