Made of polyethylene plastic, these four jugs are resistant to corrosion and can be used for a wide range of automotive and industrial fluids. They come with coloured caps –– blue, green, red and yellow –– to enable easier identification of contents and to prevent contamination. The jugs have an easy-to-open screw cap, a flexible spout with a lid and a tight-closing filling flap to keep out dirt and dust. There are clear markings in both quarts and litres.