The term 'Mug Filler' refers to a person who fills mugs with different beverages. The crossword solutions for this term are ALE (3 letters), COFFEE (6 letters), BEER (4 letters), and SUDS (4 letters). ALE is an alcoholic beverage made from malted barley, hops, yeast, and water. COFFEE is a brewed drink made from roasted COFFEE beans. BEER is an alcoholic beverage made from fermented grains such as barley, wheat, and rye. SUDS is a slang term for BEER, usually referring to the foam that forms on top of the BEER when it is poured.