A sturdy keychain!
Bio World makes a thick metal and enamel sturdy keychain in winter 2020. You can see that this is thicker than normal, and probably a bit heavy. The ring for attaching it seems thicker too. It's all silver-tone metal with a colored enamel (inset) Sonic classic face. The metal is shaped like the face, which is pretty plain and simple full color line art. (photo appears to be washing out over the lower peach color face part)
It's simple, it's classic, and it looks like something that would wear well/be around for basically ever because metal doesn't really go bad. Probably a solid buy if you didn't have something like it already. But, where are they selling it?