re: Plastic Flasks into stadium Question

I saw a dude in the student section circa 2009 with an amazing plan. He had a vacuum or heat seal bag hidden inside of a seat cushion. Where the cushion’s foam was supposed to be, the bag was hidden. The bag even had a nozzle. When he wanted a drink, he unzipped his seat cushion and poured another.

Problem was that late in the game he was pretty sauced. His arse was partially sitting on the cushion. He unzipped the cushion, removed the nozzle, and his bourbon started spraying out all over the place. He emptied it out a good bit and stumbled out the stadium shortly after.