Taco John's review: lady running drive thru took a drink out of our cup

My family went to the drive thru on 10th ave in great falls around 12:40 pm. My Dr. Pepper was stale or watered down so I asked for a new one or a different drink. The woman running the drive thru pulled a new small cup, poured new Dr. Pepper into it, turned her back and took a drink, then GAVE IT TO MY HUSBAND and told him to try it!
We recieved no hot sauce and a burrito that was requested with no tomato, had tomatoes.
Very disappointed.