Using this water bottle is a breeze. First, open the cap. You can easily fill it with water or your favorite drink because of the wide mouth. Then, add ice cubes if you like cold drinks. To drink, simply flip the cap and start sipping through the straw. When it comes to maintenance, you can wash it with mild dish soap and warm water. Make sure to dry it thoroughly to prevent mold. Avoid using abrasive cleaners as they may scratch the stainless - steel surface. Also, don't put it in the microwave or dishwasher as this could damage the bottle and the cap.