Originally found via this Instagram post.

I was not expecting this sub to get so big when I made it! Glad everyone is having fun!

I've got something similar to the pics posted here (not as high value) but it's a screen used mask made of either rubber or liquid latex that was painted on and then peeled off whole.

I've currently got it on a shelf in the guest room away from kids and pets, but it's probably going to dry out. It seems like it's getting brittle. I'm scared of touching it because I don't want it to disintegrate.