Using these Thomas Paul Vineyard tumblers is a breeze. You can use them to hold your favorite cold or hot beverages, like lemonade in summer or coffee in winter. When it comes to cleaning, just use mild dish soap and warm water. Avoid using abrasive cleaners or scouring pads as they might scratch the surface of the melamine tumblers. Also, don't put them in the microwave or dishwasher as high heat can damage the tumblers. Keep them in a dry place when not in use. If you want to return the tumblers, you can do so within 30 days according to our return policy.