What makes you think they won't smell the water? If you're really worried about drug-sniffing dogs, then I'd sprinkle your MDMA on some cold cuts and make a couple sandwiches (if they allow you to bring in food, some multi-day festivals will allow this) and let the bouncers/cops think the dogs are after your meat. It would be the officers you're trying to fool, not the dogs. I'm really doubting they'll have drug sniffing dogs though, that's pretty over-kill, but on the same token, with the reckless and rampant consumption of dangerous drugs and youth these days, festivals have to cover their asses somehow. One effective way is spread a rumor that there will be drug sniffing dogs.
I don't see how a bottle of water is easier than little ~0.5 inch capsules/pills that fit comfortably and inconspicuously at the bottom of a pocket, in your sock, girl's bra, can be spread out and hidden in different places so if they find one, they don't find them all, etc.. Your whole night could be ruined from a simple bouncer checking your bag on the way in, seeing the water, seeing that it's not factory sealed, and tossing it. Bam, goodbye drugs....all of them.
Also, I just don't understand the MDMA water thing. Can someone explain the appeal to sipping on water as opposed to just dropping your dose, aside from simply trying to conceal it? Why not just drop your one, single, solid dose right before you reach the front of the line? I would think water is less effective, less climactic, and would have similar toxic/hangover effects as re-dosing. For what I understand, and in my experience, taking a 50mg dose now, and then a 50mg dose in a couple hours is less effective AND results in more oxidative stress (aka toxicity) than simply dropping one 100mg dose and letting it run it's course. Wouldn't sipping on water throughout the night have a similar outcome? IME, one single dose gives me an afterglow the next day, whereas if I re-dose, I get a hangover, headaches, that drained/burnt out feeling, etc..
