How To Clean A Hydro Flask

If you get a fancy new bottle or flask, you want it to last as long as possible, which is why you might be wondering how to clean a Hydro Flask. Let’s find out.

How to clean a Hydro Flask
As reusable water bottles, they’re an environmentally friendly option

Hydro Flask bottles have become increasingly popular due to their stainless steel, double-wall vacuum insulation that keeps beverages hot or cold for extended periods. As reusable water bottles, they’re an environmentally friendly option, but proper care and cleaning are essential to ensure your Hydro Flask remains in top condition.

Knowing how to clean Hydro Flask bottles properly is essential for maintaining their performance and longevity. By following these cleaning tips and methods, you can keep your Hydro Flask looking and functioning like new. You might be interested in our explainer on the best materials for coffee cups.

How To Hand Wash Your Hydro Flask

To maintain the integrity of the stainless steel water bottle and its powder-coated exterior, it’s essential to hand wash your Hydro Flask. Although some Hydro Flask tumblers and lids are dishwasher safe, the manufacturer recommends hand washing all Hydro Flask water bottles to prevent damage to the insulation and powder coating. Always consult the product’s warranty and care instructions before using a dishwasher.

Materials Needed

  • Water
  • Dish soap
  • Bottle brush 
  • Straw brush

Step 1: Prepare The Water

Prepare some hot water to clean your Hydro Flask, and allow it to cool down. You can boil the kettle or turn on the hot tap in your sink.

Step 2: Fill The Bottle 

Fill the bottle with warm soapy water using mild dish soap, and let it sit for a few minutes. Use a bottle brush to scrub the inside of the bottle thoroughly, reaching all nooks and crannies. Rinse the bottle well with cold water and air dry upside down.

Step 3: Clean The Lid And Straw

Remove the straw lid, flip lid, or wide straw lid from the Hydro Flask bottle. Soak the lid components in warm soapy water for a few minutes.

Use a straw brush to clean the inside of the straw and a small brush or cloth to clean the lid’s crevices. Rinse thoroughly with cold water and air dry.

Deep Cleaning Methods To Remove Buildup And Discoloration

Baking Soda

Baking soda in water
Baking soda and water help remove buildup discoloration

A paste made of baking soda and water can help remove buildup and discoloration from the stainless steel surface. Apply the paste to a bottle brush or cloth, scrub the inside of the bottle, and rinse well with cold water. Allow the Hydro Flask to air dry.

White Vinegar

Distilled white vinegar is a natural, non-toxic cleaner that can help remove stubborn stains and grime. Fill your Hydro Flask with a solution of equal parts vinegar and warm water. Let it soak for several hours or overnight. Rinse the bottle well with cold water and air dry. You might also be interested in learning how to clean glass coffee pots.

Lemon Juice

If you prefer a more gentle solution, lemon juice is an excellent alternative to vinegar for removing buildup and discoloration. Mix equal parts lemon juice and warm water, then fill the Hydro Flask. Let the solution sit for a few hours or overnight, then rinse the bottle thoroughly with cold water and air dry.

Cleaning Tablets

Some retailers offer cleaning tablets specifically designed for stainless steel water bottles. These tablets are generally safe for use with your Hydro Flask but always follow the manufacturer’s instructions.

Fill the bottle with warm water, add a cleaning tablet, and let it dissolve. After the recommended soaking time, use a bottle brush to scrub the inside of the bottle, then rinse well with cold water and air dry.


Although not typically recommended due to its harsh nature, a mild bleach solution can be used as a last resort to remove stubborn stains and grime. Mix one tablespoon of bleach with a gallon of warm water.

Fill the Hydro Flask, let it soak for several minutes, then scrub with a bottle brush. Rinse the bottle very thoroughly with cold water to remove all traces of bleach, and air dry.

Cleaning Tips For Hydro Flask Accessories


If you’ve decorated your Hydro Flask with stickers, avoid submerging the bottle in water for extended periods, as this may cause the stickers to peel. Instead, clean around the stickers with a damp cloth and mild soap.

Hydro Flask Straw Lid

The Hydro Flask straw lid requires special attention to ensure it remains clean and free of buildup. Disassemble the straw lid, separating the straw from the lid.

Soak the components in warm soapy water for a few minutes. Use a straw brush to clean the inside of the straw and a small brush or cloth to clean the lid’s crevices. Rinse thoroughly with cold water and air dry.

Hydro Flip And Wide Mouth Lids

Both the Hydro Flip and wide mouth lids can be cleaned by soaking them in warm soapy water and using a small brush or cloth to clean the nooks and crannies. Rinse with cold water and allow them to air dry.

Warranty Considerations

Ensure you follow the manufacturer’s cleaning recommendations to maintain the warranty on your Hydro Flask bottle. Improper cleaning methods can void the warranty.

Top Rack Dishwasher Cleaning

While not recommended for the bottle itself, some Hydro Flask lids and accessories may be top-rack dishwasher safe. Always consult the product’s care instructions before placing any components in the dishwasher.

Extra Tips For Maintaining Your Hydro Flask

  • Regular cleaning: To prevent buildup and maintain your Hydro Flask’s performance, clean it regularly, especially after using it for beverages other than water.
  • Air dry: Always allow your Hydro Flask to air dry completely before storing it. Storing a damp bottle can lead to mold and mildew growth.
  • Avoid abrasive cleaners: The stainless steel surface and powder coating of your Hydro Flask can be scratched or damaged by abrasive cleaners or scrubbing tools. Stick to mild soaps and soft brushes or cloths.
  • Inspect for damage: Regularly inspect your Hydro Flask for any signs of damage, such as cracks, chips, or dents. If you notice any issues, contact the manufacturer regarding warranty coverage or consider purchasing a replacement.
  • Store with the lid off: Storing your Hydro Flask with the lid off will allow air to circulate, preventing unpleasant odors and mold growth.

Benefits Of Hydro Flask Bottles

Hydro Flask bottles are popular because of their numerous benefits, especially compared to plastic water bottles.

Exceptional Insulation

The innovative double-wall vacuum insulation of Hydro Flask ensures that your drinks maintain their temperature for extended durations. Hot beverages can stay warm for approximately 12 hours, whereas cold beverages can remain chilled for about 24 hours. This insulation makes Hydro Flask the perfect option for keeping your preferred drinks at the ideal temperature all day long.

Robust Construction

Hydro Flask bottles are crafted from premium 18/8 food-grade stainless steel, providing resistance to rust, corrosion, and impact. The powder-coated exterior offers added resilience against scratches and dents, guaranteeing your bottle’s appearance matches its performance.


Hydro Flask bottles help reduce single-use plastic waste, which contributes to environmental degradation. The durable design ensures the bottle will last for years, lessening your ecological footprint and encouraging a more sustainable way of life. You might be wondering why are paper coffee cups not recyclable. 


Red BPA free water bottle
BPA-free often found in plastics that are linked to potential health hazards

Hydro Flask bottles are free from Bisphenol A (BPA), a chemical often found in plastics that are linked to potential health hazards. Choosing a BPA-free bottle allows you to savor your beverages without the concern of harmful chemicals contaminating your drink.

Secure, Leak-Proof Lids

Hydro Flask bottle lids are engineered to prevent leaks, ensuring your drink remains safely contained. This feature is particularly advantageous when carrying your bottle in a backpack, sports bag, or handbag.

Great Selection Of Sizes And Styles

Hydro Flask bottles come in a range of sizes, colors, and lid options. From compact bottles for brief excursions to larger bottles for extended outings, there is a Hydro Flask to accommodate everyone.

Versatile Uses For Hydro Flask

  • Nature expeditions: Whether you’re trekking, camping, or spending a day by the ocean, a Hydro Flask bottle will keep your beverages at the original temperature, ensuring you remain hydrated throughout your adventure.
  • Physical activities and sports: The insulation and leak-proof design render Hydro Flask bottles an exceptional choice for athletes and fitness enthusiasts. Enjoy refreshing, ice-cold water during exercise or a steaming cup of coffee preceding an early morning jog.
  • Exploration: Hydro Flask bottles serve as ideal companions for extended road trips or air travel, preserving your drinks at the desired temperature and eliminating the need for disposable containers or cups.
  • Daily commuting: Use a Hydro Flask to retain the heat of your morning coffee during your daily commute, or keep chilled water readily available to maintain hydration throughout the day.
  • Gift-giving: With their sleek design and practical functionality, Hydro Flask bottles make outstanding presents for friends and family members who appreciate both aesthetics and utility.
  • Personalization: The powder-coated exterior of Hydro Flask bottles is perfect for customization. Apply stickers or decals to express your personality for a look that’s distinctly yours.
  • Storing food: Besides beverages, Hydro Flask containers can be used to store food, too. Their temperature-retention capabilities render them suitable for maintaining soups, stews, and other hot or cold meals.


  • Kate S

    Kate has been writing since she was 10 years old, tapping away on an old typewriter in her childhood bedroom. Today, Kate is a seasoned freelance writer with over 10 years of experience writing for print and online media. She’s an avid reader and believes in the power of words to transport readers to new worlds, and inspire and nurture creativity. Kate is also a published author and is currently working on her next project.