https://www.youtube.com/watch?v=oEmSM0tHnzUPumps food through feeding tube for people who can't eat solid food. Designed to be very durable. More info in the 2 links below (including links to the 3D model, fully editable, and a circuit diagram for the electronics)https://cad.onshape.com/documents/21d93d7fa07f4e049c1e2344/w/f15984352f124ccf842135a6http://eleccelerator.com/3d-printed-peristaltic-pump/