Sorry if this has been asked before, but I've searched and can't find anything specific to US Customs.

I have never brought in over my duty free amount of alcohol, but I'm currently in Japan, and well, love sake. I want to bring more than 1 bottle, but I only have $40 left (and credit cards, which I don't want to rely on).

The CBP website is absolutely terrible at even suggesting how much duty is due. Does anyone have any idea? If it's over $40, do they just confiscate the extra, or am I in real trouble?

I'll be going into DFW, if that matters.