Methods of using and manufacturing a thermal transfer apparatus

A method comprising:

• disposing a thermal transfer apparatus in a freezer, wherein the thermal transfer apparatus comprises:
• a first container comprising:
• a first wall, and
• a second wall connected to the first wall at ends of each wall, thereby defining a first enclosed cavity:
• at least two protrusions extending from the first wall into the first enclosed cavity towards the second wall and each protrusion comprising a third wall defining a second enclosed cavity;
• a first thermal transfer media positioned within the first enclosed cavity, wherein the first thermal transfer media comprises a first superabsorbent polymer and a first solution at least partially absorbed by the first superabsorbent polymer;
• and
• a second thermal transfer media positioned within each second enclosed cavity, wherein the second thermal transfer media comprises a second superabsorbent polymer and a second solution at least partially absorbed by the second superabsorbent polymer, wherein the first thermal transfer media has a first freezing point lower than a second freezing point of the second thermal transfer media:
• cooling the thermal transfer apparatus to a temperature of less than or equal to the second freezing point, thereby forming a cooled thermal transfer apparatus;
• and
• disposing the cooled thermal transfer apparatus against a portion of a body of a patient and conforming the cooled thermal transfer apparatus against the portion of the body of the patient to absorb heat.