View full post @ http://www.thedroptest.com/gadget-and-gizmo-reviews/grip-go-cell-phone-accessories/
Interestingly enough, beyond use in our favorite cell phone accessories such as, the “Grip Go”, suction cups have actually been around since 4 BC. It is believed Hippocrates used gourds as suction tools for drawing “bad” blood from his patients… which was proven later in history not to be a medically sound practice. In the late 19th century, modern day suction cups were invented initially to assist in developing photography plates and adopted later for other industrial applications (via). If you have ever wondered how strong a suction cup is, you can calculate strength of the vacuum seal using the formula F=AP, where F = force, A = area, and P=pressure.