Miniature (Nips) of port in Boston area??
I called over to Bauer Wines because I loved this ideas for a favor but Howie says he's never seen them. Perhaps port is not bottled in nips in this country. Half bottles are about the best he can do.
When ever you need something like this, you can go to your favorite store, they can look in their master books and see if it is available to order.