To use these wine glasses, simply pour your favorite white wine into them and enjoy. When it comes to cleaning, they are dishwasher - safe, which makes maintenance a breeze. However, to keep them in top condition, handle them gently as they are made of glass. Avoid hitting them against hard surfaces to prevent chipping or breaking. If you prefer hand - washing, use a mild dish soap and a soft sponge. Remember, this item is covered by a 30 - day return policy, so if you're not satisfied, you can return it within the specified time.