Don't bother with the Brita. I thought the same thing when I first got here. 2 things.... Mine broke on the luggage carts at the airport...they tend to throw bags!
Second...it was probably a good thing....the bottled water here is fine. I don't recommend the tap water. But hey, everyone's system is different.

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Just remember that life down here is not a sprint, it's a 4 semester-long marathon.