What is it? Aluminium is a naturally occurring element and actually the most abundant metal in the Earth’s crust. Aluminium has a low corrosion rate, is extremely light and 100% recyclable. Applications: Aluminium foil has a wide range of uses including packaging, cooking, insulation and art. We use a small amount in the packaging of A Good Humanium Metal Pen. NO plastic NO waste YES low corrosion YES infinitely recyclable YES satin finish YES lightweight