Austria's liquid nitrogen makes cans more resistant to pressure

Austria found a way to increase the pressure resistance of cans for food packaging.

This method is to add some liquid nitrogen in cans filled with food. When liquid nitrogen evaporates, nitrogen can produce more pressure inside the can, which can improve the anti-impact ability of cans and reduce the damage of cans under pressure. Nitrogen can also extrude part of the oxygen in the can, which can prevent the oxidative deterioration of the food in the can.