CAD Design - Hollow Egg and Plastic Snap on Lid Box

1. Need someone to re-scale a STL format CAD drawing of a 4"x4"x4" box so that the inner contents can accommodate an egg shaped object that contains a sphere in the inside that is 60mm x 47mm in size. 2. Need a CAD drawing of a hollow egg shaped object that contains a sphere 60mm x 47mm in size. It should be airtight, and once closed and sealed with glue cant be opened up . This isn't rocket science here think plastic Easter Eggs. Need to have two designs made for a injection mold one for ABS plastic and one for aluminum. (looking for different price points) I also need to re-engineer the CAD drawing of the exterior box. I want a lid to be able to snap on and off if need be. I don't really want to use screws in order to maintain a seamless look. If you have an idea how to improve this design then feel free to bid on this project. I've got STL files and a prototype of the box made but i feel this design needs a little more work before going into production. Just need someone to tweak the lid design a bit. This should be a easy project if you already know what to do. See pictures attached