Centrifuges - They're what separate the men from the boys

They can also separate out the constituent elements of each group by density, allowing you to discard the useless organic slop and keep the valuable heavier metals. This is a good shirt for anyone who's been either a lab tech or a Bond villain, and as a bonus gives you a chance to start arguments by using the word "centrifugal" correctly.
A perfet T-shirt for a laboratory scientist

Read more:
Centrifuge

Source: xkcd