A jar is a container typically made of glass, plastic, or ceramic, used for storing food, liquids, or other items. Jars come in various shapes and sizes, often featuring a wide mouth for easy access. They are commonly used for preserving fruits and vegetables, as well as for storing dry goods like grains and spices. Many jars have a lid that seals tightly, helping to keep contents fresh and protected from air and contaminants. Some jars are designed for specific purposes, such as mason jars for canning or pickle jars for brining. Their versatility makes them popular in kitchens and households worldwide.