The principle is simple. By vacuum (by squeezing the flask) you fix the flask on the chest. This in combination with your shoot reflex may be sufficient. Sometimes an extra pinch is needed. And you’re done. So you don’t have to pump by hand.
– Dishwasher safe and can be sterilized by leaving it in boiling water
– Easy to use, easy to clean
– Free from BPA, PVC, Phthalate and bleaching agents
– No wires, batteries or construction required