How to Get Coffee Stains Out of a Stanley Tumbler?

I have been busy lately juggling my responsibilities as a mom of two and writing on my blog. I have found myself in need of more coffee.

But lately, I’ve noticed coffee stains lingering in my Stanley cup. Honestly, I might not have washed it as regularly as I should have, or maybe I haven’t used the right tools.

After each use, I hand-washed my Stanley cup in soapy water, so that was not the problem.

After reading through forums and Facebook groups, I discovered that soaking your Stanley cup in baking soda, denture cleaning tablets, and a rice soak does the trick.

Three Ways To Remove Coffee Stains

1. Baking Soda

Baking soda is a great cleaning agent that is safe for your Stanley. It has a slightly textured surface that can remove stubborn coffee stains without causing any damage. 

Coffee is naturally acidic, but baking soda’s alkaline properties can help to neutralize its acidity. 

Baking soda has deodorizing properties. So it absorbs lingering coffee smells and leaves your Stanley smell fresh.

Method

1. Prep Your Stanley: Ensure your Stanley is empty and dry. Add a generous amount of baking soda (2-3 tablespoons) directly inside.
2. Activate and Soak: Put warm water to create a paste-like consistency. Fill the remainder of your Stanley with warm water and let it soak for several hours or overnight for best results.
3. Rinse and Inspect: Thoroughly rinse your Stanley. For extra stubborn stains, consider repeating the process.

For the most part, denture cleaning tablets are a surprisingly effective way to remove coffee stains from your Stanley. 

These tablets contain cleaning agents and mild disinfectants that break down stains and eliminate odors.  

Method

1. Fill your Stanley with warm water.
2. Drop in one or two denture-cleaning tablets.
3. Let the solution soak overnight (or for several hours).
4. Give your Stanley a thorough rinse and enjoy the stain-free results!

Lastly, rice soak can tackle those stubborn coffee stains in your Stanley.

The uncooked rice grains create thousands of tiny scrubbers, gently loosening coffee buildup without damaging your tumbler. Rice is slightly absorbent, which may help draw out its staining compounds.

However, remove all the rice grains from your tumbler and straw.

How to Use It:

1. Add a handful of uncooked rice (about a quarter cup) to your empty Stanley along with warm water.
2. Secure the lid tightly and give your Stanley a vigorous shake for a minute or two.
3.  Let the mixture sit overnight. In the morning, give it another good shake, then rinse thoroughly.

You can choose between baking soda, denture tablets, or rice water to get the coffee stains out of your Stanley tumbler. Remember, coffee stains are ugly to look at and leave a lingering smell in your cup.