One of the QarmaQ?s key features is its innovative use of recycled polyethylene terephthalate (PET) plastic bottles to create a large portion of the vehicle?s skin. GE says the use of plastics, instead of more traditional metal and glass, gives the vehicle a 130-pound weight savings. That weight loss equates to 20 gallons a year savings in gas, not to mention fewer plastic bottles clogging up the local landfill. These numbers are nothing to scoff when you think of all the cars on the road.