Piston providing for reduced heat loss using cooling media

A piston for an internal combustion engine, comprising:

• a body formed of a metal material;
• said body including a crown presenting a combustion surface;
• said crown including an outer side wall depending from said combustion surface, said outer side wall presenting an outer diameter of said body;
• said crown including an outer cooling gallery and an undercrown cooling gallery;
• said outer cooling gallery extending circumferentially along said outer side wall beneath said combustion surface, said outer cooling gallery being sealed and containing a first cooling media;
• said undercrown cooling gallery being surrounded by said outer cooling gallery beneath a first undercrown surface, said undercrown cooling gallery containing a second cooling media;
• and
• said crown including a lower wall extending along said undercrown cooling gallery, said lower wall including an inlet hole to said undercrown cooling gallery, and said inlet hole to said undercrown cooling gallery being tapered.