Using your GSI Boulder Hip Flask is a piece of cake. First, open the hinged silicone cap and fill the flask through the wide mouth with your favorite beverage. When you want a drink, just tip the flask and pour. The graduation marks are great if you need to measure how much you're pouring. As for care, you can hand - wash the flask with mild soap and warm water. Avoid using abrasive cleaners that could scratch the body. Store it in a cool, dry place when not in use. Since it's shatter - resistant, it can handle some bumps, but try not to throw it around too much. Also, keep in mind it's BPA - free, so you don't have to worry about any harmful chemicals leaching into your drink.
