My question involves criminal law for the state of: California


So about 2 months ago i got pulled over for "lane straddling", cop pulled me over, said it smelled like marijuana so he searched the car, he also found a 6pac of corona and a bottle of tequila with like a sip left in a zipped up backpack, he also found a weed grinder. he charged me with an MIP and an open container as well as possession of less than an oz of marijuana.

My question is regarding the possssion of marijuana ticket, there was no baggy of weed contatiner containing any measurable amount of marijuana, all they found was my grinder with again nothing in it except like marijuana residude from its use but not really a measurable amount, is there any way to beat this charge because the only evidence they have is my grinder and no exact amount of marijuana found, thanks