Three Elves went into a bar, each with out saying a word.  Put one gold coin in a large mug of red liquid. 

They preceded to go to end of the bar and take a seat. 

Minutes later, Everyone hears !  Who Golded my  drink.. 

Says a grumpy dwarf looking all mad an steamed. 

The elves speak up.. Oh Sorry Keep the Tip.. 

Damn Elves, don't look first for correct cup for tips.