The Barbasol can is a camouflaged container that Nedry uses to smuggle genetic information, i.e. dinosaur embryos, off the island to an unnamed group that is willing to pay him a lot of money for this act of industrial espionage.
The exterior case looks identical to an off-the-shelf can of Barbasol shaving cream, and hides a metal cradle for the DNA vials. With a twist, the cradle pops up. When twisted back, the cradle locks into place. Dennis uses this under tight time constraints to steal the DNA samples and carry them. Continue reading