The 'hopper shell is unlike most Tamiya kits in that it is hard ABS white plastic, which is deliberate as you can sticker it up and get pretty close to Box art, Without having to paing anything, in keeping with the entry-level nature of the kit.
I may get another shell off eBay as son no. 2 wants it in candy green.
@geniusmusing they've been reissued! The Hornet and Frog too.