Air-tight Single Piece Pump - Shkolnikov Pump

Well, one printed part anyway. You still need to put in some tubing. After having some trouble with the first peristaltic pump I tried, I did some Google-ing and came across this:
http://microfluidics.stanford.edu/Publications/Micropumps_Cooling/Shkolnikov-selfpriming-rollerfree-minature-peristaltic-pump.pdf

It is basically a diaphragm pump with the check valves and diaphragm integrated into a single piece of plastic. The best performing version so far can be viewed here:

http://youtu.