I'd say that you're a bit unlucky. People have done that where I work and we have just thrown them out and barred them. No police involvement.
If they are to prosecute, it stands to reason that you'll be charged with theft, but I'm no lawyer so couldn't be sure.
If I were you I'd hope that the police/bar are far too busy to deal with the theft of two drinks and that you get a slap on the wrist/caution.
I'd also take this (considering you have previous of 'silly incidents') as a warning that perhaps you should ease up on the consumption of alcohol if it contributes you to behaving like that.
Good luck.