How to Clean a Hydro Flask Water Bottle

hydroflask water bottle


Project Overview
  • Working Time: 5 - 10 mins
  • Total Time: 5 mins - 1 hr
  • Skill Level: Beginner
  • Estimated Cost: $2-5

Hydro Flask water bottles are made from insulated, double-walled stainless steel with a powder-coated exterior in a wide range of colors and sizes. The powder coating is lightly textured for ease of gripping and the durable stainless steel resists denting. You can purchase the bottle with a standard BPA-free plastic cap, sports cap, or flex straw cap. Learn how to clean a Hydro Flask water bottle for years of safe, pleasant use.

How Often to Clean a Hydro Flask Water Bottle

As with any reusable water bottle, a Hydro Flask water bottle should be cleaned after every use or at least daily. Weekly sanitation to remove any possible harmful bacteria is recommended.

Before You Begin

While all Hydro Flask plastic lids and stainless steel bottles are top-rack dishwasher safe, hand-washing is recommended by the manufacturer.

What You'll Need

Equipment / Tools

  • 1 Sink or plastic dishpan
  • 1 Bottle brush
  • 1 Dish drainer
  • 1 Microfiber cloth
  • 1 Straw brush or chenille sticks
  • 1 Small bowl


  • 1 bottle Dishwashing liquid
  • 1 bottle Chlorine bleach
  • 1 bottle Distilled white vinegar
  • 1 box Baking soda
  • 1 container Disinfectant wipes


How to Clean a Hydro Flask Bottle and Lids

  1. Create a Cleaning Mixture

  2. Wash the Bottle

    • Submerge the bottle and lid in the hot, soapy water.
    • Use a nylon-bristled bottle brush to gently scrub the interior. Pay particular attention to the threads around the neck of the bottle.
    • Use a brush or a microfiber cloth to clean the exterior of the bottle to remove grime and oils from your hands.
  3. Wash the Lid

    • For the standard plastic cap, use a microfiber cloth dipped in soapy water to wipe the interior and exterior surfaces.
    • For the sports cap, pop the cap to the open setting. Use the microfiber cloth dipped in soapy water to wipe the exterior and interior of the cap, including the interior of the valve well. If you cannot fit the cloth inside the valve, use a straw brush or a chenille stick.
    • For the flex straw cap, open the exterior straw top and remove the interior straw from the cap. Use a wet, soapy microfiber cloth to wipe the exterior and interior of the cap. Use a straw brush or chenille stick to clean the exterior and interior straws.
  4. Rinse the Bottle and Lid

    • Use hot water to rinse the bottle well.
    • Rinse every type of lid well in hot water. Use hot running water to flush the interior of any straw.
  5. Allow the Bottles and Lids to Air-Dry

    Place the bottles and lids upside down in a dish drainer to air-dry.

  6. Sanitize a Hydro Flask Water Bottle

    For a bottle that you use daily, it should be sanitized weekly to kill bacteria.

    • To sanitize with chlorine bleach, fill a clean sink or dishpan with one gallon of hot water. Add one tablespoon of chlorine bleach. Add the bottle, lid, and straw to the solution and let them sit for five to 15 minutes. Rinse with hot water and allow to air dry.
    • To sanitize with distilled white vinegar, mix a solution of 2 tablespoons of distilled white vinegar per 1 cup of hot water. Mix enough solution to fill the water bottle and extra to soak the lid and straw. Fill the bottle and a bowl with the solution and add the lids. Let them sit for 15 minutes. Empty the solution, rinse components well with hot water, and allow to air dry.

Tips to Keep Your Hydro Flask Water Bottle Clean Longer

  • If you use your Hydro Flask bottle for beverages other than water, rinse the bottle with water.
  • To quickly flush a Hydro Flask flexible straw cap used for beverages other than water, sip some plain water through the straw or hold it under a faucet of running water.
  • If you don't have a straw brush, thread dental floss through the flexible inner straw, submerge the straw in soapy water, and use your fingers to pinch and rub the straw and floss together while it soaks to dislodge grime.
  • Be sure all components of the flask are thoroughly dry before storing with the cap separate or ajar. 

Removing Odors From Hydro Flask Water Bottles

  • If your bottle has an odd odor or taste, mix 2 tablespoons of baking soda with a teaspoon of warm water in a small bowl to form a paste.
  • Dip a bottle brush in the paste and scrub the interior of the bottle and the cap. The baking soda acts as a mild abrasive and deodorizer.
  • Rinse the bottle in water and then wash it as recommended.
  • If the odor remains, use the stronger cleaning action of the dishwasher. Run the bottle and cap through a regular cycle on the top rack of the dishwasher.
Article Sources
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  1. How to Keep Your Water Bottle Germ-FreeMichigan State University Extension, 19 Nov. 2018

  2. How to Keep Your Water Bottle Germ-FreeMichigan State University Extension, 19 Nov. 2018