Elastomer, Polystyrene and Polyester Construction Hachiman. Designed to be stacked on top of each other, they come in three sizes – large, medium and small – and are made from elastomer – a super-flexible, yet durable, material, that also happens to be scratch-resistant and recyclable. Like all the rest, this large brown one comes with two sturdy carry handles - in contrasting green - and a felt inner base to keep your belongings safe.