Paramedics and field medics can patch up some wounds on the spot, but they're usually stuck if they have to administer specialized drugs. What if you need medicine that health care workers don't have on hand? You might not have to rush back to the hospital in the future. Researchers have created tiny, microfluidic bioreactors that generate the proteins you need for medicine. At its heart are two very long (16 feet) channels wound into an extremely tight pattern, and divided by a customized, porous membrane -- one channel feeds chemicals, while the other hosts the reactions that produce your drug. You only have to shake the device to send protein from one side to the other and get the medicine you need.