Yes that liquid inside it is H2O (water)

Cera:*holding a fuqin’ bat*

Time to break some glass.... *lemon demon laughter*

Glass: try it :)

Cera:* b o n k *

*Glass doesn’t even have any scratches or dents, though the water inside him shook a little*

Cera: ...

*Smiling*

Glass: I doubt even multiple shots from a shotgun could do much damage to me.

Cera:*confused*

Void: want to find out? *shotgun appears in her hands*

Glass: I mean, why not?

Cera: ah, okay