Used oil barrels only upsurge landfills after serving their purpose in industries. With increasing metal scrap, even environmental hazards are rising day by day. Although industries don’t recycle retired oil drums because of their very little scrap value, these can be transformed into something that serves various functions in your home or office. Oil drum furniture is eco-friendly in nature and practical in approach. Such old oil barrels can be upcycled to build attractive yet practical furniture pieces, giving an industrial makeover to your living space. Here are 30 clever ways to convert retired steel drums into eco-friendly furniture for daily use.