Hope Wine donates 50% of their profits to charity. No gimmicks, no caps, no limitations. They sell a bottle of wine, they make a donation to charity. They are currently offering 3 different types of wines, with the profits from each type of wine being tied to a different charity:
Cabernet Sauvignon profits support Autism related research and charities
Merlot profits support AIDS related research and charities
Chardonnay profits support Breast Cancer related research and charities
If you're the person in charge of buying the wine for this year's holiday festivities, you might want to consider supporting a company who supports these causes.
Read more about Hope Wine in an article by AZCentral.com (also available in a pdf format).