How to Clean Your Water Bottles and Hydration Bladders

Want to avoid growing a science project in your water bottle or hydration bladder? We’ve got the cleaning tips and tricks to keep them squeaky clean
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bottle and hydration bladder

Learn how to maintain your hydration bladders and water bottles, and they'll serve you well.

Regardless of whether you are using an empty Gatorade bottle or the fanciest Camelbak on the shelf, staying on top of cleanings is the best way to keep mold and other bacteria in check. Try to clean your water bottle or hydration pack after every use.

Mammoth Lakes, California-based hiker and mountain biker Tom Kearns recommends having a routine.

“I’ve got a cup hook next to the sink, like what you put a coffee cup on,” Kearns says. “I rinse out my hydration bladder when I get home and hang it upside down on the hook. I put a paper towel inside to help absorb the moisture and completely dry it out.” Find your own routine with these simple tips.

A steel water bottle from Casq

A steel water bottle from Casq

How to Clean Water Bottles

Cleaning plastic, reusable water bottles may seem pretty straightforward, but if not cleaned and stored properly they can develop strange odors or tastes. After each use, water bottles should be rinsed and air dried completely. One of the most common mistakes is to leave water bottles in a wet environment or full of liquids.

Cleaning is even more important if you put liquids other than water, such as juice or electrolyte drinks, in your water bottle. Leaving these liquids inside for an extended period can result in unpleasant tastes, odors, and mold.

If your bottle really needs a good cleaning, invest in a bottle brush and give it a good scrub as you rinse it. Again, make sure to let it dry completely before your next adventure. Overnight is usually sufficient.

If your bottle is too gross for a rinse and a scrub to take care of it, you can use baking soda for a deeper clean. Simply add hot water and a couple teaspoons of baking soda to the water bottle and let it sit overnight (you can add a couple drops of household bleach as well if desired). Rinse in the morning and run through a dishwasher cycle if you are so inclined. Let dry completely.

One more method of cleaning a funky water bottle is to fill it with regular white vinegar and let it sit overnight. Rinse and scrub with soap and water in the morning. This method may leave a bit of a vinegar odor behind but it should fade quickly.

Stainless steel bottle? Any of the techniques above should work, but use caution with the dishwasher: Some single-wall bottles are OK to run through the machine, but most vacuum bottles are hand wash only.

Gregory Hydration Bladder

Gregory Hydration Bladder

How to Clean Hydration Bladders

Hydration bladders have been around since the late 1980s. The most famous brand on the market, Camelbak, was born when founder Michael Eidson filled an IV bag with water and stuck it in a tube sock while competing in a race. Since IV bags are not known for their reusability, cleaning came later.

However, regular rinsing and drying are again your best friend. When it’s time for a deeper cleaning, grab some dish soap and one of the following cleaning solutions and get your clean on:

Reservoir cleaning tablets: Drop one into warm water.

Baking soda: A couple teaspoons go a long way.

Household bleach: Two to five drops is plenty. Mix it with the baking soda for some extra-strength cleaning.

Lemon juice: Helps neutralize odors. About ¼ cup to one liter of water should do the trick. You can mix this with the baking soda, but beware: This mixture will get fizzy, fast.

Get a brush kit that includes a brush for the hose and mouth piece. Fill the bladder with warm water and add your choice of cleaning solution. Give it a shake and allow the solution into the hose by pinching the mouthpiece. This will allow the entire system to have contact with the cleaning solution. Let it sit for 5 to 20 minutes depending on which cleaning solution you are using (tablets need less soaking time).

Drain the system and then fill again with warm, soapy water. Scrub the interior of the bladder, making sure to hit all the problem areas.

Next, use the hose brush to get all of the tough-to-reach spots in the hose as well as the bite valve. These pieces are hotspots for collecting moisture and can get gnarly pretty quickly if you don’t pay attention.

If you don’t have a cup hook like Kearns, you can try other drying aids such as a reservoir hangar (sometimes comes with the brush kit), clothespins or simply put the bladder upside-down and prop it open with a kitchen spoon or other utensil to give it plenty of room to breath and dry.