Compostable - Our egg shells are 100% recyclable, biodegradable and compostable. You can use them as a simple seed tray to germinate your seedlings, or you can crush the boxes to create compost for your garden. Stackable - Our sturdy egg crates are stackable to save space. The durable cellulose fibre material provides strength and support to prevent crushing of your eggs. MULTI-PURPOSE - Our empty egg boxes are versatile for storing small tools and car parts, bath bombs, candy, candles, arts and crafts projects and more. You can even use them to insulate your walls / ceilings. * When used as sound insulation, treat the apartments with fire retardant material. ORGANIZE YOUR FRIDGE - Our egg box can be stacked in multiple layers, each egg holder can hold up to 30 eggs, which is large enough to meet your daily needs. Our egg box is made of food grade PE material, which is BPA free, non-toxic, odorless and easy to clean. You can use it very easily.