The lid securely fits the Superio Ribbed 5 Liter Storage bin. Made from durable materials, it withstands daily use and allows the bins to be stacked for easier space saving and efficiency. While the lid is designed mainly to enable stacking of the bins it also adds an appealing finishing touch to the bins. Furthermore, it keeps your belongings safe from dust and dirt. The smooth and thin surface promotes effortless cleaning and space-saving storage. Upgrade your ribbed bin for a more efficient and aesthetically pleasing storage experience.