There are certainly some clever ways that one can come up with when it comes to sneaking alcohol into Coachella. The thing that one must realize is that Coachella is noted as having some of the toughest screens and security checks when it comes to alcohol. Sneaking it into suntan spray bottles was effective until staff caught on and now they check them. As far as trying to sneak huge bottles that is not going to happen.
A person's best bet would be to use small flasks or another bottle that will hold about a couple shots as max. That is the thing with sneaking alcohol into Coachella. There are those out there who say that it is darn near impossible to do. One could certainly figure that with the tight security that is always present. Then again if there is a will, there is a way anything can happen so if one is determined to sneak alcohol into Coachella then they can certainly try it.