Using the Stelton Foster Water Glass is easy. Just fill it with your favorite drink, whether it's water, wine, or any other beverage. You'll notice how it keeps your drink cold for a long time. When it comes to cleaning, use mild dish soap and warm water. Avoid using abrasive cleaners as they might scratch the stainless steel surface. Also, don't put it in the dishwasher to prevent any potential damage. For long - term storage, dry it thoroughly and keep it in a cool, dry place. Remember, this item is covered by a 30 - day return policy if you're not satisfied.