How to Clean a Hydro Flask

Why Hydro Flasks Need Regular Cleaning

Hydro Flasks are built to last — but their vacuum-insulated stainless steel interior still accumulates coffee and tea stains, biofilm, and odors over time. The narrow opening and powder-coated exterior require specific care to keep the bottle performing and looking its best.

What You'll Need

• Dawn Platinum Dish Soap
• Bottle brush with long handle
• Cup lid gap cleaning brush set
• Bottle Bright cleaning tablets
• Baking soda
• White vinegar

Daily Cleaning After Every Use

1. Disassemble the lid completely — remove the gasket and any straw
2. Rinse the bottle with warm water immediately after use
3. Add a drop of dish soap and warm water, scrub inside with a long bottle brush
4. Use a lid gap brush to clean the lid threads, gasket groove, and straw
5. Rinse all parts thoroughly and air dry with the lid off

Weekly Deep Clean: Bottle Bright Method

1. Fill the Hydro Flask with warm water
2. Drop in one Bottle Bright tablet
3. Let fizz and soak for 30 minutes
4. Shake gently, rinse thoroughly, and air dry
5. Soak lid parts in a separate bowl with another tablet

Bottle Bright is Hydro Flask's own recommended cleaning method and is safe for all stainless steel and powder-coated surfaces.

Removing Coffee and Tea Stains

Add 2 tablespoons of baking soda and warm water to the flask. Scrub with a bottle brush and let soak 30 minutes before rinsing. For stubborn stains, a Bottle Bright tablet soak is more effective.

Cleaning the Powder-Coated Exterior

• Wipe the outside with a damp cloth and a drop of dish soap
• Never submerge the exterior in water for extended periods — it can affect the powder coat
• Avoid abrasive scrubbers on the exterior — they scratch the coating

What to Avoid with Hydro Flask

• Dishwasher: High heat damages the vacuum insulation and powder coat
• Bleach or chlorine: Damages stainless steel and leaves harmful residue
• Freezing: Can damage the vacuum seal
• Abrasive scrubbers: Scratch the interior and exterior

Final Thoughts

A long bottle brush for daily cleaning and a weekly Bottle Bright soak are the official Hydro Flask-recommended cleaning routine. Always store with the lid off and dry completely to prevent mold and odors.