There is no corkage fee for any wine you take to lunch. Depending on your ports, you may want to purchase local wines to try. Unlike the mass market cruise lines, Regent lets you bring on wine and spirits in any port and take them directly to your room to use anytime on the cruise or to take home.
I don't know what the individual bottle charge is, but your room stewardess can let you know. I know that their liquor purchase prices are low and the wine may be as well.
