4 x Really Useful Boxes 84 Litre, Plastic Storage Box – New + Free Next Day Del. Save time and space with a Really Useful 84 litre storage box. Solid, strong and stackable with a lid that locks securely in to place, it comes as part of a fully interchangeable range. A clear polypropylene container which lets you see easily what’s stashed inside. Designed to be versatile, it is a great way to keep odds and ends neatly stored or could even serve as a low-cost filing solution. 84 litre polypropylene storage box. Clear so you can see the contents. Part of a fully interchangeable range. Lid locks securely in place.