Go on, put a cork in it.
To alleviate some confusion: It may soon be legal in Massachusetts for restaurant patrons to take home unused portions of wine from dinner. Being in the restaurant business, I always hate to be the jerk that says, “no, sir or madam, I’m afraid you can’t take that with you.”
The logic is simple: If you aren’t forced to finish the bottle at the restaurant, you are less likely to drive while impaired. It would save lives, claim some. Others are more suspicious, alluding to the lifting of the restriction as a trap to enforce open container laws. That shouldn’t cause you any trouble with your leftover wine, as long as you obey some simple guidelines:
When you leave with your leftover wine, make sure it is securely corked. Put it in a bag, and stash it in your trunk. If you get pulled over (assuming you aren’t legally impaired,) the state will not be able to prosecute you for an open container violation if the bottle is tightly closed and out of reach.