
Water bottles can sometimes smell like perfume due to bacteria build-up, which is common when you use your water bottle daily and don't wash it thoroughly and regularly. This can be prevented by regularly cleaning your water bottle and ensuring it dries completely before reuse. Plastic water bottles are also susceptible to wear and tear, which can allow bacteria to build up and contaminate the water. To remove unwanted odours, it is recommended to soak the bottle in boiling water, baking soda solution, or white vinegar.
| Characteristics | Values |
|---|---|
| Reason for the smell | Bacteria build-up, trapped odours, or mould/mildew |
| Solutions | Wash with warm soapy water, soak in baking soda solution, soak in white vinegar, soak in boiling water, or invest in stainless steel water bottles |
| Prevention | Regularly clean the bottle, ensure it dries completely before use, and store without the lid after washing |
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What You'll Learn

Water bottles trap odours and bacteria
Water bottles, especially those that are reused, can trap odours and bacteria. This is because germs thrive in warm, moist environments, and a reusable water bottle is the perfect place for bacteria to grow, especially if it is used daily and rarely washed. According to a 2022 study by WaterFilterGuru, the average reusable bottle contains 20.8 million colony-forming units (CFUs) of bacteria—that's 40,000 times more than a toilet seat!
If you use your water bottle daily, it is important to give it a thorough wash at the end of each day to prevent bacteria, mould, and unpleasant odours. For workout enthusiasts, daily cleaning is even more critical. Sweat, germs from your hands, and heat trapped in gym bags can accelerate bacterial growth. Therefore, it is recommended to scrub your bottle with soap and lukewarm water every day and do a deep clean once a week.
There are also other methods to clean your water bottle and remove any trapped odours or bacteria. One method is to soak your bottle in boiling water overnight and then wash it with warm soapy water the next morning. Another method is to use a baking soda solution by scooping two teaspoons of baking soda into your water bottle, filling it with warm water, and letting it sit overnight. You can also use an antibacterial mouthwash to rinse your bottle and remove any trapped odours or tastes.
If your water bottle continues to smell bad even after cleaning, it may be time to replace it. Damaged bottles can harbour bacteria in areas that are impossible to clean.
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Inadequate cleaning leads to bacteria build-up
The primary reason why a water bottle smells is due to bacteria build-up. This is a common problem when you use your water bottle daily and do not wash it thoroughly and regularly. If you do not wash your water bottle properly, microorganisms can increase and cause an unpleasant odour and taste. Water bottles are good at trapping odours and bacteria, which can create an odour inside them.
To prevent bacteria build-up, it is important to regularly clean your water bottle. This means giving it a soapy scrub every day. If you forget to wash your bottle for more than a day, an overnight soak in boiling water should get rid of any slight funk. You can then wash it with warm soapy water in the morning and see if the smell has gone. If your bottle still smells, you can try a baking soda solution. Scoop two heaping teaspoons of baking soda into your water bottle and fill it with warm water. Let it sit for a couple of hours or overnight, then rinse thoroughly.
If your water bottle still smells funky, you can try a white vinegar soak. Fill your water bottle with white vinegar and let it soak overnight. Vinegar is great at neutralizing odours because of its astringent properties. However, this method can leave a vinegar smell in your bottle. To get rid of this, try another overnight soak in hot water. If the smell persists, you might want to invest in a self-cleaning water bottle.
It is also important to let your water bottle dry completely before using it again. After washing your bottle, store it without the lid so it can air dry quickly. This will help prevent bacteria build-up and keep your water bottle smelling fresh.
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Contamination by mould or mildew
One of the reasons why your soft water bottle smells like perfume could be contamination by mould or mildew. Water bottles are good at trapping odours and bacteria that can create an odour inside them. If you don't properly clean the container that holds your water, it can become contaminated with mould or mildew, which can produce smells that transfer to any liquid contents in the bottle. This can leave an unpleasant odour and taste.
To prevent this, you should regularly clean your water bottle. It is recommended to wash your bottle thoroughly and regularly to prevent the buildup of microorganisms. You can soak your bottle in boiling water overnight and then wash it with warm soapy water in the morning. You can also try a baking soda solution, which deodorises. Fill your water bottle with warm water and two heaping teaspoons of baking soda, letting it sit for a couple of hours or overnight. Rinse your bottle thoroughly and see if the smell has gone away.
If your bottle still smells funky, you can try soaking it with white vinegar. Fill your water bottle with white vinegar and let it soak overnight. Rinse with warm soapy water in the morning and reassess. If the vinegar smell remains, another overnight soak in hot water should get rid of it.
If the smell persists, it might be time to upgrade to a self-cleaning water bottle.
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Odours from the water itself
Water bottles can also pick up odorous chemicals from their surroundings during shipping or storage, which can cause an unacceptable smell and lead to consumers rejecting the products. This is more common with plastic water bottles, which are not impermeable to odours.
Water with a musty scent could be caused by organics polluting your water. A solution to removing this musty smell is to sanitise your plumbing system, including your water softener. If your water supply smells fishy, the same bacteria that infiltrates pond or lake water could be in your supply. Organic matter could be the culprit, such as decaying leaves or broken-down plants.
If your water smells like sewage, it could be because the water in your water heater has been left unused for too long. The smell could be originating from the bacteria that were harvested in the lower temperatures while the water heater was off. If the smell is only coming from warm or hot water, it's most likely your water heater. Contact your local water dealer to replace your magnesium anode.
If your water smells like rotten eggs or sulfur, it could be due to the presence of sulfur bacteria or hydrogen sulfide. The bacteria feed on decomposing organic matter, creating hydrogen sulfide gas, which gets trapped in the plumbing system. Elevated levels of hydrogen sulfide can be harmful and cause nausea, headaches, delirium, and convulsions.
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Invest in stainless steel bottles
If you're tired of your water bottle smelling like perfume, it might be time to switch to a stainless steel bottle. Stainless steel water bottles are an environmentally-friendly alternative to plastic bottles, reducing the amount of waste sent to landfills and decreasing greenhouse gas emissions. They are built to last, scratch and dent-free, and can be expected to last around 12 years before showing any signs of wear.
Stainless steel bottles are also a healthier option. Unlike plastic bottles, they are BPA-free and completely free of toxins. Studies have shown that BPA, an industrial chemical used in manufacturing plastic, can seep into food and water and has been linked to certain health conditions. Stainless steel is a sterile material that prevents the growth of mould and bacteria, keeping your water fresh and odour-free for longer.
In addition to their durability and health benefits, stainless steel bottles are also versatile and convenient. They are insulated, featuring double-wall construction with a vacuum layer to maintain the temperature of your drinks. This means you can enjoy your coffee hot and your water cold, even if the bottle has been sitting in a hot car. And with various lid options, including straws, spouts, or flip tops, you can easily take your bottle on the go.
While glass bottles are also a reusable alternative to plastic, they may not be as durable or effective at temperature control as stainless steel. Glass bottles are dishwasher-safe and easy to clean, but they don't retain hot or cold temperatures like insulated stainless steel bottles. So, if you're looking for a bottle that can keep your drinks at the perfect temperature for hours, stainless steel is the way to go.
By investing in a couple of stainless steel bottles and carrying one with you, you can stay hydrated, reduce your environmental impact, and protect your health. So, make the switch today and say goodbye to smelly water bottles forever!
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Frequently asked questions
Soft water bottles are good at trapping odours and bacteria that can create an unpleasant smell inside them. This could be due to bacteria build-up, or because the bottle has picked up odorous chemicals from its surroundings.
To prevent your water bottle from smelling, make sure to wash it thoroughly and regularly. After washing your bottle, store it without the lid so that it can air dry quickly.
To wash your water bottle, give it a good overnight soak in boiling water. Then, wash it with warm soapy water in the morning and do a sniff test. If the smell persists, try soaking it in a baking soda solution or white vinegar.
Your water bottle may smell like a wet dog due to bacteria build-up. This is a common problem when you use your water bottle daily and do not wash it regularly.
Preventing your water bottle from smelling will ensure that you do not get sick from drinking contaminated water. It will also ensure that you can continue using the same water bottle, reducing waste and saving money.











































