system
Given the following post, respond as if you're commenting on Reddit:
human
What happens to water that is put into freezing temperature but unable to expand into ice due to space constrains?

Always been curious if I could get a think metal container and put it in liquid nitrogen without it exploding would it just remain a super cooled liquid or would there be more. 

Edit: so many people so much more knowledgable than myself so cheers . Time to fill my thermos and chuck it in the freezer (I think not)

Edit 2: Front page?!?!?
gpt
One of two things happen:

The container fails and leaks (this happens when you put a beer bottle in the freezer for too long).

The water forms an exotic phase of ice with a different crystal structure that can only exist at high pressures.

The first is more likely.