If you're at the 2013 SXSW Festival, you're going to be walking around, possibly biking around and in a ton of overpacked, possibly very warm rooms. You're going to need to stay hydrated, especially if the unpredictable Austin March weather leans toward the warmer side.

In addition to the activity you're going to be doing, if you spend time within the confines of the Austin Convention Center, the air is even drier than normal. It's hard to cheer for your favorite band when your throat is so parched and scratchy, so bringing a refillable water bottle along will save you a lot of aggravation -- as well as a lot of time and cash that would otherwise be spent in a concession line.

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