Using this water bottle is a breeze. First, open the flexible straw cap and fill the 32 oz wide - mouth bottle with your favorite beverage and ice. Then, close the cap. When you want to drink, simply flip the cap and start sipping. For cleaning, use mild soap and warm water. Avoid using abrasive cleaners as they may scratch the stainless - steel surface. Also, don't put it in the dishwasher. If not in use for a long time, make sure the bottle is dry to prevent any unpleasant odors.