This is a strap, keyholder, or charm.
From the GoodSmile website:
A miniature Red Bull Energy Drink can that transforms into a plane!
This miniature Red Bull Energy Drink can is attached to a keychain, and can be transformed into a plane and back with just the push of a button! This product was produced by Good Smile Company as one of the Red Bull Air Race Executive committee members, and is one of the first ever official products to make use of the Red Bull can in its design.