Using your Orrefors City Double Old Fashioned glasses is easy. Simply pour your favorite spirits or cocktails into the glass and enjoy. When it comes to cleaning, you can just pop them in the dishwasher as they are dishwasher - safe. However, to keep them in top condition, try to avoid banging them against hard surfaces. If you hand - wash them, use a gentle dish soap and a soft sponge. And that's all you need to know to make the most of your glass set!