If you're gonna last 24 hours, you're gonna need to stay hydrated. Or you can fill it with beer. Either way, this is a handy, albeit nerdy, way of transporting a few gallons of essential liquids as you barhop your way around the city. And if you do fill it with booze, you'll never have to go a minute without slurping down more firewater.

Buy It Now at Camelbak, $80