If you had empty beer cans on the floor of the car, somebody was drinking in the car.  If somebody was drinking in the car, there was an open container in the car.I'm not a California attorney but I'd be very surprised if an open container charge was not a violation of your DUI probation.  I'm pretty sure if you read the probation conditions in your paperwork, it will be clear to you.IF you really weren't drinking -- and if nobody was drinking in your car -- you need a lawyer.  One place to find an attorney is our website, http://attorneypages.com