wedding

One of my friends, who's based overseas, is getting married next month in our home country. It's been customary for us to give gifts to marrying couples. However, in my friend's case, she's based abroad and so it would not be practical to give her the usual wedding presents. I also do not want to give her money. Instead, I want to give her and her future husband something that they can keep during their marriage. But it has to be handy and convenient to bring back with them when they go back abroad. Any ideas?