One new research project that hopes to change that. Scientists from ETH Zurich have created tiny magnetic DNA particles that can be encapsulated in silica, and mixed in with the oil. The DNA can store tons of information such as the oil's source and quality. They particles are small and cheap to produce, with a cost of about $.02 per bottle, according to R&D Magazine. Since they contain small pieces of iron oxide, they can be easily separated from the oil with a magnet, and then "read" rather easily via a process called PCR. As R&D Magazine noted, the method also "made it possible to detect adulteration: if the concentration of nano-particles does not match the original value, other oil—presumably substandard—must have been added."