Handheld palm cooling device

A cooling device for reducing the temperature of a user through contact with glabrous tissue comprising:

• a vessel having an enclosed inner cavity and an exterior surface;
• a mixture residing within the inner cavity comprising a working fluid and secondary element;
• a heat pipe having a proximal end and a distal end, wherein the proximal end of the heat pipe is in contact with the working fluid, and a section of the heat pipe towards the distal end extends a length beyond the external surface of the vessel;
• and
• wherein the secondary element is an alternate phase of the working fluid.

A cooling device for reducing the temperature of a user through contact with glabrous tissue comprising:

• a vessel having an enclosed inner cavity and an exterior surface;
• a mixture residing within the inner cavity comprising a working fluid and secondary element;
• a heat pipe having a proximal end and a distal end, wherein the proximal end of the heat pipe is in contact with the working fluid, and a section of the heat pipe towards the distal end extends a length beyond the external surface of the vessel;
• and
• wherein the secondary element has a melting point higher than the working fluid.

A cooling device for reducing the temperature of a user through contact with glabrous tissue comprising:

• a vessel having an enclosed inner cavity and an exterior surface;
• a mixture residing within the inner cavity comprising a working fluid and secondary element;
• a heat pipe having a proximal end and a distal end, wherein the proximal end of the heat pipe is in contact with the working fluid, and a section of the heat pipe towards the distal end extends a length beyond the external surface of the vessel;
• and
• wherein the secondary element comprises polyethylene glycol.

A cooling device for reducing the temperature of a user through contact with glabrous tissue comprising:

• a vessel having an enclosed inner cavity and an exterior surface;
• a mixture residing within the inner cavity comprising a working fluid and secondary element;
• a heat pipe having a proximal end and a distal end, wherein the proximal end of the heat pipe is in contact with the working fluid, and a section of the heat pipe towards the distal end extends a length beyond the external surface of the vessel;
• and
• wherein the vessel further comprises a port which passes between the external surface and the interior cavity, said port having a lid which operates between an open state and a closed state, wherein the lid in the open state allows the interior cavity to be filled with the mixture, and the wherein the lid in the closed state forms a watertight seal of the interior cavity.