It is very hot & humid on freight docks, just part of the job. So, one has to supply themselves with appropriate coolers for water that are safe to have in a dusty environment. One day I bought a 7-11 giant size mug, which holds approximately 3/4's of a gallon. It was emblazoned with the most obnoxious black & white, striped design I've ever seen. Also, it was the last one available. When I walked onto the dock, one of my co-workers said; 'that's your new nick name - Big Gulp!" And it has stuck. If folks tease you, that means you are liked.