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There's nothing worse than opening your to-go cup of coffee, ready for a delicious (and healthy) sip , only to find your beverage at room temperature. A thermos keeps things hot or cold, keeping the contents as close to their original temperature as possible. They're also designed for travel and can stay safe whether you're heading to the office with just cold water or heading camping with a healthy soup .
Caring for your thermos is a little different than what you would expect from your typical reusable bottle or container . While many thermoses claim to be dishwasher safe when placed on the top rack, when in doubt, hand washing is the way to go to avoid damaging the insulation . But don't worry, there are some simple tips and tricks you can follow to keep your thermos in top condition for years to come. Read on to learn everything you need to know about cleaning a thermos.
Also see: 15 easy ways to clean your kitchen
how does a thermos flask work
A thermos uses vacuum insulation technology to keep hot contents hot and cold contents cold. The bottle-in-bottle design has a vacuum between the two walls, so whatever you put inside stays at the same temperature for longer.
The design does not conduct heat and also prevents the formation of condensation on the outside. Stays at room temperature/cool to the touch even when something inside is freezing or boiling hot. Thermos flasks are available from different brands in different capacities and colors.
How to clean a thermos
Here are three popular ways to clean your thermos of coffee and soup stains, and even remove any lingering odors.
vinegar and baking powder
The combination of vinegar and baking soda is a tried-and-true cleaning trick for common kitchen clutter.
Pour 1/2 cup white distilled vinegar into your thermos and sprinkle 1 tablespoon baking soda on top. The suit undergoes a chemical reaction to form foam.
Add some warm water and leave the mixture on for about 10 minutes.
Use a bottle brush or hot water cleaning cloth to thoroughly clean the inside of your thermos. Repeat if necessary.
denture cleaning tablets
You may know the cleaning power of denture tablets if you wear braces or dentures. It's also an effective way to clean your thermos!
Fill 1/2 to 3/4 of your thermos with warm water.
Place one tablet in the thermos and let sit for 5 to 10 minutes until bubbling stops.
Use a bottle brush or hot water cleaning cloth to thoroughly clean the inside of your thermos. Repeat if necessary.
ice and salt
Add crushed ice to your thermos along with about 2 tablespoons of sea salt. (Salt naturally has antibacterial properties.)
Close the lid and shake well, like you would with a cocktail shaker.
Use a bottle brush or hot water cleaning cloth to thoroughly clean the inside of your thermos. Repeat if necessary.
As previously mentioned, many thermos manufacturers recommend washing them by hand, even if they're labeled dishwasher safe. You risk damaging the insulating vacuum seal by putting it in the dishwasher, defeating the purpose of a thermos.
How not to clean a thermos
Now that we've covered some tips for cleaning your thermos, there are also a few things you should NOT do when cleaning.
Do not use chlorine or bleach to clean your thermos. These chemicals can be too harsh and damage the stainless steel interior.
Do not use very hot or boiling water to clean your bottle. Not only will using boiling water damage the paint or exterior of your thermos, it could also cause it to melt and even break the vacuum seal, causing your thermos to not insulate properly.
Tips for maximizing the life of your thermos
Thermoses are designed to be used with liquids, so this isn't the place to store old leftovers. Think soups and stews, coffee and tea, or even milk and juice. This is our top tip for maximizing your thermos's ability to insulate both hot and cold contents.
For cold content
Put your thermos in the fridge or freezer in good time. For lack of time? Fill it with ice and water for a few minutes.
Take your thermos out of the fridge and pour out the ice water.
Add your cold coffee, juice or smoothie and close the lid.
for hot content
Fill your clean thermos with hot water and put the lid on.
After a few minutes, remove the lid and drain the water.
Add your hot soup, tea or coffee and close the lid. The temperature of the contents should be higher than if you were to consume them straight away, so be careful when filling your thermos.
Remember, once you've opened your thermos to enjoy its contents, you should discard anything you don't like to prevent the growth of harmful bacteria.
When to throw away a thermos
Even with proper care and cleaning, not every item in your kitchen will last forever , including a thermos. When you find that the contents are no longer staying insulated, hot or cold, it's probably time to say goodbye. Also watch out for chips or cracks in your thermos - use this flashlight on your phone if you must. If the inside of your thermos is damaged in any way, it's time to replace the thermos.
Conclusion
Thermos flasks are a useful tool to have on hand all year round. To ensure they stay as clean as the whistles, use any of the recommended cleaning methods: vinegar and baking soda, denture tablets, or ice and salt.
Going on a camping adventure? Not without delicious recipes that fill you up! Check out these 24 healthy camping recipes .
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