From the Know before you Go Brochure:

Alcoholic Beverages
One liter (33.8 fl. oz.) of alcoholic beverages may be
included in your exemption if:
• You are 21 years old.
• It is for your own use or as a gift.
• It does not violate the laws of the state in which
you arrive.


Not saying to do it or not, just saying what the brochure says.

It's a great publication by the way, available here

http://www.cbp.gov/linkhandler/cgov/...eforeyougo.pdf