Eco Eggs Compostable Easter Fillable Eggs - 28 Count They are made from non-toxic, durable plastic and have a tight snapping closure. Eco eggs are extra-large in size measuring 3" x 2.25" so most bagged candies fit inside. They come in 5 assorted colors: pink, yellow, green, blue, and purple. Eco eggs can be stored and reused for many Easters. After use, dispose of eggs in industrial compost. Compostable Plastic Easter Eggs Made From Plants.