Device and methods for freezing liquids into a flat form

A method of freezing liquid in a flat form, comprising:

• providing a first plate including,
• a first surface, wherein the first surface is completely flat and extends to four outer edges of the first plate, and
• a spring pin extending over the first surface;
• providing a second plate including,
• a second surface, wherein the second surface is completely flat and extends to four outer edges of the second plate, and
• a cylindrical opening formed through the second plate;
• disposing a bag containing a freezable liquid between the first plate and second plate with the first surface of the first plate and the second surface of the second plate oriented toward the bag;
• and
• inserting the spring pin of the first plate into the cylindrical opening of the second plate to attach the first plate to the second plate with a bag containing freezable liquid squeezed between the first surface of the first plate and the second surface of the second plate, wherein the spring pin applies a force outward against a cylindrical inner surface of the cylindrical opening while remaining slidable in the cylindrical opening to allow a separation between the first plate and second plate to increase as the freezable liquid freezes and presses outwardly against the first plate and second plate.