Snapple mystery...?

Question

I recently bought a flat of snapple juice from costco and when put in the freezer it does not freeze. BUT, if you take it out and open it up to allow a little air in and close it back up, when you shake it, the once fully liquified juice turns to slush.... why?? and how??

Answer 1

Because when containers are pressurized, not enough space is there for ice to form. Because water expands when frozen, no room for ice.

I think that may be the reason.