Is it safe to order drinks with ice cubes?
Yes. Ice cubes in the Dominican Republic are only made with purified water in factories around the country. No matter where you are (in the hotel, in a restaurant outside the hotel or on an excursion), you will only be served purified (bottled) water and ice cubes that had been made from purified water as well. Even the smallest and most local restaurant outside the hotel resorts use ice cubes that are made with purified water, so there is no need to worry.