The Nesting Box is $70 and it's a box designed to hold Wingspan and all it's expansions. I can see the use of such a thing because it's currently a bit of a pain setting up a game when the components are spread out over multiple boxes but I just don't think it's worth the cost.

The Nesting Box does not come with the base game or any expansions and is solely used to store those items.

https://store.stonemaiergames.com/products/wingspan-nesting-box