Secure Galactic Federation Crate

A Secure GF Crate is a container only witnessed in Metroid Prime 2: Echoes. It is indestructible, being "made up of the strongest materials in the cosmos". Thus, it is unknown what their purpose is, though it may have been to guard precious materials. They are only seen in the Industrial Site.

Scan
"Object scan complete. This is a Secure GF Crate. These crates are made of the strongest metals in the cosmos. They cannot be destroyed."