Ok, before we get into things, this should be taken with a grain of salt. I'm not advising you to break rules of music festivals etc, or the law, I'm merely hypothesizing ways in which to get alcohol into an event where they charge $10 for a dixie cup of flat beer.
Things You Will NeedThere are a few different products on the market that are perfect for this type of thing (sneaking beer/liquids into stadiums, concerts & festivals, etc.) and are always available on the internet. I'm going to focus on the simpler way of sneaking booze into an outdoor festival like Coachella.
You will need an empty bottle of sunscreen (washed out).
Step 2A lot of these events might even be no-alcohol allowed (due to people getting violent, riots, etc.) so take caution and avoid getting caught.
Remember, sunscreen usually works if it is sunny, or if you carry a purse (or have a girl with you) it might just seem as a regular accessory one might carry around.
Thanks for reading on how to sneak booze into an event.