First of all....yes, you can do this, but you are going to have to be prepared before you actually start. You must have all the good ready to juice right there in your frig. I don't recommend drinking store bought juice because it is not alive and it isn't going to give your body nourishment and vitality like freshly juiced juice. But, if it were me, I would go for the fresh, chilled juice from the health food store before I would put a morsel of food in your mouth. Once you do that, you're sort of starting over. When you are going to be in a situation where others are eating, you have to have your juice right there, ready to go. Otherwise, you know what will happen.....funnel cake, popcorn, whatever. REMEMBER....NOTHING TASTES AS GOOD AS BEING THIN FEELS!