Sean Ragan made a set of syringes out of LEGO pieces:
The most difficult part of this design was actually getting the colors right. The rarest part is not, in fact, the chrome silver antenna, but the 8-long dark gray Technic axle. Generally, even-length Technic axles are black and odd-length axles are dark gray. The dark gray 8-long axle was included, so far as I can tell, in only one kit. And dark gray is the only color in which all the plunger parts are available. And this is the only plunger design I’ve come up with that satisfies me.
You can view a parts list at the link.
Link via Make | Photo: Sean Ragan
Previously by Sean Ragan: Choose Your Own Adventure as a Graph