Officers treated the incident as a hazardous material situation and called in the SBI to investigate.
Pictures from Chopper 11 showed the car stopped on the shoulder of the highway with officers searching inside. One lane of I-40 West was closed while the investigators did their work.
A man was taken into custody. Troopers said 29-year-old Michael Edwards of Johnson City, Tennessee was wanted in Tennessee on outstanding warrants.
He now faces North Carolina charges of driving with a revoked license and possession of drug paraphernalia. Officials said the contents of the jar will be analyzed.