Plastic barrels have a number of uses, including collecting rainwater, water storage, composting and hydroponics, notes Home Depot. Plastic barrels are also used for general storage.
Some plastic barrels are built specifically for shipping, especially safely transporting hazardous chemicals and food, states United States Plastic Corp. Some plastic barrels also come with spigots so that users can easily retrieve the contents inside, notes Home Depot.
While large companies primarily use these barrels for storage, individuals can make a number of different items out of them, such as lawn furniture, flotation devices and even costumes. Some people also use them for dog houses or to make homemade beehives, states DIY-Alternative-Energy.com