This design follows that of a car's camshaft. The cam would roll along the top of this design to push the liquid throughout with a wave-like motion.

This design uses nitinol, a piezoelectric material which contracts upon energizing. Several rings of nitinol would be placed along the tube, and a program would electrify each one with a delay between the last, in order to create a wave-like motion.

This design uses toy-like pinchers which would pinch the test section of the tube in succesion to create a peristaltic flow. This design was also intended to be portable, for mobile demonstation.

This design is inspired by a camera's aperature, which would close axisymmetrically around the tube using torque applied to it. The aperatures would be powered by a motor, using gears to rotate the aperature and close each one synchronously.

In the first round of concept selection, our five designs were ranked on grounds of selection criteria, such as ease of use and flow rate. Each concept was given either a positive score or a negative score for each criteria, and when added up would give a final score. The two lowest scoring designs, the grip pinch device and the nitinol design, were eliminated in this round. In the second round the final three designs were ranked more precisely with weigted number rankings for each criteria. The highest scoring design, the camera aperature design, was chosen as the final design.