A fairy tale

  Once upon a time there lived a king.  The king
 had a beautiful daughter.
  Everything the girl touched, would melt.  No
 matter what, metal, wood, plastic, etc.  Everything 
 she touched would melt!

 Because of this, men were afraid of her and nobody
 would dare to marry her.
 One day a wizard told the king, "If your daughter
 touches one thing that does not melt in her hands,
 she will be cured."

 The king was overjoyed.  The next day, he held a
 competition, any man who could bring his daughter
 an object that would not melt, got to marry her and
 inherit the king's wealth.

 Three young princes took up the challenge.  

 The  first prince brought a huge diamond, thinking
 that a diamond is the hardest substance and would
 not melt.  But alas, once the princess touched 
 it, it melted!  The prince went away sadly.

 The second prince brought a very hard alloy, but
 the same thing happened.....so he too went way.

 The third prince told the princess, "Put your hand
 in my pocket and feel what is in there..." 
 The princess did as told, though turning  red.
 TaDa!   It did not melt!!!

 The king was overjoyed!!!   And, the third prince
 lived happily ever after with the princess........

 Question:  What was the object?  (Scroll down for
 the answer)
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 Answer: M&M's
 Melt in your mouth, Not in your hand
 (I know what  you were thinking you dirty
 minded person!)