�y��vlog

There is room for just one small bottle in the world's first refrigerator that is cooled with artificial muscles made of nitinol, a nickel-titanium alloy.

Known as 'artificial muscles', the shape-memory wires made of super-elastic nitinol absorb heat in the cooling chamber and release it to the outer environment.

To transport heat, the researchers use the special 'superpower' of the artificial muscles made of nitinol: shape memory.

The reason for this lies deep inside the nitinol, which has two crystal lattices -- two phases that can transform into each other.

Unlike water, whose phases are solid, liquid and gaseous, the two phases of nitinol are both solid.