Abstract: The present invention relates to boxes, particularly boxes formed from polymer materials, especially expanded polystyrene (EPS) or other expanded polymer materials. However, the invention is applicable to boxes generally, including those formed from cardboard, board, wood, metal, etc. Boxes formed from EPS or other expanded polymer materials are used in vast numbers for a huge range of purposes. For example, such boxes are used generally as transport containers, for transporting all manner of goods, including raw and processed food, plants, electrical products, chemical products, pharmaceutical products, and biological materials. Boxes formed from such materials have many advantages, including low manufacturing cost, thermal insulation properties, low density, and impact resistance.