Because the packed sugar and water dry hard, and royal icing is made to harden as well, you may be able to reuse these decorative eggs for multiple years. You would need to pack it carefully in an air-tight container somewhere that ants or rodents wouldn't try to get to it. u003cbr/u003eu003cbr/u003eThey can be fragile so wrapping in paper or bubble wrap would be best. And it would be best to use decorations in place of candies which can break down over time.