A "mystery box" is a package or container filled with unknown items, often used in games, promotions, or online shopping. The contents are typically a surprise, which adds an element of excitement and curiosity for the recipient. Mystery boxes can vary in theme, price, and quality, making them appealing to a wide audience. These boxes are popular in various contexts, including subscription services, retail promotions, and online auctions. They can contain anything from toys and gadgets to clothing and collectibles. The unpredictability of the contents is what makes mystery boxes intriguing for many consumers.