There is no significant difference in the basic structure between mason jars and ordinary bottles, but their functions and uses are different. Mason jars are airtight containers that are not only used to store food, but are used for a variety of creative purposes because of their fresh appearance, variety of sizes, and high malleability. For example, they can be used to pickle pickles, serve as coffee or water glasses, carry salads, make layered brownies, or even be transformed into light bulbs, vases, potted plants or bathroom storage kits. The specialty of Mason jars is that the bottle and lid are sold separately, and the lids come in many types, such as one-piece, two-piece, perforated, and even piggy bank-like lids. In contrast, ordinary bottles are usually used to hold liquid substances such as water, oil, etc. In addition, mason jars and ordinary bottles are also different in shape. Mason jars are mostly cylindrical, while canning jars are usually pot-bellied ovals.