Allison0927 is right... I have not been banded, but from what I've read from many people on this site, is the liquid diet is to shrink your liver. And I don't think one weak moment (esp. popcorn) is going to void the entire diet. Just a word of advice: if you're anything like me..I've tried just about EVERY fad and serious diet before making the decision to get banded.. but it wasn't all a waste. I've learned a lot..one of the most important things I've learned is HOW to eat. Not just physically, but psychologically and chronologically. Allison is right.. planning is EVERYTHING. I'm not sure what kind of Protein shakes you have (or are allowed to have), but if you can transport them, do so. Get a little cooler or a cup that you can store the powder in and just throw a bottle of Water w/it for later. Get the magic bullet to go..LoL! It seems silly, but it's convenient if you don't wanna do just powder and water and you wanna throw some ice in with it. Grab some pudding and applesauce..throw them in your cooler too! You sound like you have a very hectic schedule (or it could have been a one-off situation)..but either way, planning ahead keeps you from being in a position where have to decide between a starving headache or counter-productive junk food.
One of my mantra's is "No excuses for food abuses!" ..LoL! It's lame..but it keeps me accountable and forces me to make previsions for the future (near or distant).
I think you'll be just fine! Just remember to plan, plan, plan and stay the course!!
Best wishes doll!!