Santa's Habits

This evening we were driving home and passed the gas station convenient store.  He must have seen an advertisement.  The conversation that followed:

Ethan:  Santa doesn't drink Coke!!!!!

me:  I agree.  What do you think he drinks?

Ethan:  Reindeer Milk.

me:  And maybe Hot Cocoa?

Ethan:  Yes!  And he eats cookies.

me:  What else does he eat?

Ethan:  Candycanes.  (slight pause) That's why he is a bit plump.