Things You'll Need
Instructions
Fill your flask with water and swish it around to rinse the inside before and after each use. Do not use soap or cleaning products when cleaning your flask, as it may stain the stainless steel. If the flask develops an odor, pour a small amount of white vinegar, about three cap fulls, and 1 tbsp. of baking soda into the flask, along with water, and then shake the liquid around once the lid is secure.
Pour the water out. Do not let the water sit inside the flask for an extended period. If you used vinegar and baking soda, rinse the flask out several times.
Allow the flask to air-dry with the lid off.
Fill the flask with the liquor or beverage of your choice when you are ready to use it. You should not leave liquor in the flask for more than three days at a time.
Rinse out the flask with water after every use and allow it to air-dry.