Answer:
Well to start, as fragile as the eggs are, there should be a more durable material you feel me? Like maybe try something such as a rubbery product but one that isn't so tough on outside but not too soft on the inside. Basically a cushion but where is accessible for the eggs. We also dont want a material that is way to hard because it leaves no room for the eggs and its a very difficult workspace.
Step-by-step explanation:
Hope this helps and good luck on your project :)