Is there a hollow 3 dimensional shape that can exist within a frozen ice without being crushed?

Question

Certainly an air bubble apparently can, or it appears that way. Is there something other than a sphere that can exist within the ice? Why or why not?

Answer 1

air or oil r summin is going to take the shape of a sphere no matter what in ice, that's cause for equal volumes, a spehere has the least surface area

naturally an air bubble is going to try and minimize the forces per unit area acting on it to reach equilibrium faster

so a sphere is not only the ideal shape to form, it is the only...

this goes into the chapter of surface tension...

incidently...a soap bubble in air presents the same situation...

now imagine, a square bubble!?