Can an officer pound your car for finding an open alcohol container in the car you are driving?

I was driving my dad's car and was pulled over for speeding and the officer found an open alcohol container in the back seat. I explained to him that I had no idea it was back there and that I wasn't drinking. The officer gave me a breathalyzer test in which I passed and he still took my car and ticketed me for the open container but not speeding. Now I'm having a difficult time getting my car out because they are slow processing the paper work. I have license, insurance, and current tags. Did the officer violate my rights? Do you have any advice on how I should move forward? Thank you.