You might confuse your coworkers drinking out of the sharps container... Your new favorite beverage receptacle specifically designed with paramedics, nurses and medical professionals in mind.  

20oz stainless steel tumbler with a lid and straw. Double insulation keeps cold liquids cold and hot liquids hot. Hand wash recommended. 

Label reads : Drop, do not force sharps into container. Forcing could cause puncture. Avoid contact with the contents of this container - consuming may result in a caffeinated states leading to productivity, jitters, insomnia or even death.