Square HDPE plastic bottles are used in a wide range of industries. They are ideal for storing and transporting chemicals, detergents, paints and foodstuffs. Their high resistance to aggressive substances makes them a reliable choice for companies in the chemical, cleaning, paint and food industries. Square HDPE plastic bottles are used in a wide range of industries. They are ideal for storing and transporting chemicals, detergents, paints and foodstuffs. Their high resistance to aggressive substances makes them a reliable choice for companies in the chemical, cleaning, paint and food industries.