Yet, another part ID question: Large blue dish
Set #4417- Aero Pod. 




Top. Part #4767 - Blue
Container, X-Pod Top Cap 9 x 9 x 1 1/3.
Middle.  Part #47674 -
Trans-Yellow Container, X-Pod Barrel Section 10 x 10 x 3 1/3.
Bottom.  Part #47676 - Blue
Container, X-Pod Bottom Cap 9 x 9 x 1.