Using your Stanley Classic Hip Flask is a breeze. Simply unscrew the cap and fill it with your favorite beverage. Make sure the cap is tightly screwed back on to prevent any leaks. When it comes to cleaning, you can use warm soapy water and a soft cloth. Rinse it thoroughly and let it dry completely before refilling. As for storage, keep it in a cool, dry place. Avoid dropping it or subjecting it to rough handling as it might damage the flask. With proper care, your flask will serve you well for a long time.