Blood Mug - Blood Donor Gift - Phlebotomist Gift - Blood Gift - Phlebotomy GiftKeep 'em guessing about what you're drinking. Throw some high-octane coffee in our cute new blood mug, toss in some red food coloring and maybe you can freak out your phlebotomist friends. Did you know what MGUS is an acronym for monoclonal gammopathy of undetermined significance --  a condition when abnormal proteins are found in the blood? Get your MGUS MUGS here.