H2O2 and Baking Soda: The Ultimate Insulated Mug and Thermos Restoring Combination

Insulated coffee mugs are great, no question; but after a while, even with regular washing, they can look pretty dingy and even affect the taste of your favorite brew.

What to do?  You can’t put them in the dishwasher, and even if you could, it probably would not accomplish what you want. Because what you want is a like-new fresh and clean cup with no coffee stains, that has no taste or odor of coffee.  A mean trick if you’ve been using it for any length of time…

There is one solution that is simple, fast and works like a charm.

Place two or three tablespoons full of baking soda in the cup; fill it about three quarters full with hot tap water, add either two tablespoons of 35% food grade hydrogen peroxide or, if using 3%, just top off the cup until full with the 3% H2O2, and let it sit overnight. To get the lid fresh and clean just set it sideways in the top of the full cup, so the opening you drink out of is submerged in the liquid as well.

There is no more powerful and effective whitening and de-odorizing combination than baking soda and peroxide, as the pictures here make clear.  In the morning, just rinse the cup out with running water, no scrubbing, no work, no muss no fuss.

You’ll know just how great this little remedy for a clean coffee cup is when you taste the next cup you pour into that cup – WOW! Fresh coffee that tastes like fresh coffee!

This is also a great tip for anyone who has an insulated cup or thermos that has been used for coffee for a long time.  Especially if you decide to switch to tea or want to use the thermos for soup or some other hot beverage – and don’t want it all to taste like old coffee. Just use this same procedure and you have a thermos or insulated cup that will deliver a nice cup of earl gray or whatever else you like to drink and it will not taste like you are drinking tea or soup made with coffee.

Thermos cleaned with H2O2 and Baking Soda

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