This is not a liquid or a gas

From NileRed Shorts.

Going supercritical:
This is just a bunch of dry ice, and it’s basically just solid carbon dioxide. What I think is interesting though is what happens, if I seal some of it in a pressure chamber, and heat it up.

Nile talks about lab safety (Chemistry is Dangerous):

NileRed Beaker mugs:

■ NileRed: