Subject: When hands are around a hot drink do they insulate it or cool it?

My friend and I have been having a friendly heated discussion as to whether or 
not hands act as an insulator to a hot drink or do just the opposite and cool 
it.  I am of the opinion that they act just as a “coffee sleeve” would and 
insulate it and prevent the coffee from losing its heat.  My friend on the 
other hand insists that the coffee loses its heat faster through the median of 
the hands rather than through the air.  Which is it?

Re: When hands are around a hot drink do they insulate it or cool it?