How to get Garlic & other strong Spices' smell out of my Zojirushi Flask/ Thermos acquired via a herbal Immunity decoction?

Question

Major components of this decoction were:

Garlic cloves 
Black Pepper seeds 
Cinnamon 
Bay Leaf 
Ginger 
Cumin seeds
Turmeric powder
Coriander powder 
Fennel seeds

Flask Product & Materials info:

https://www.zojirushi.com/app/product/smkhe

Its SlickSteel® finish interior is corrosion resistant and repels stains.
Durable and sanitary 18/8 stainless steel interior with SlickSteel® finish 
Made of BPA-free plastic and stainless steel
Structure, design & details as pulled from product website

Mine is the Stainless Steel colored 16 oz one:

More data from Manufacturer's website FAQ and Manuals:

[QUOTE]
Q3: How can I clean my vacuum bottle?
A: Always rinse out your vacuum bottle after each use and rinse the stopper under running water. Do not soak the vacuum bottle in water or place in a dishwasher to clean.

The exterior, stopper and cup(s) can be cleaned using a moist sponge or soft cloth and mild dishwashing liquid.

The interior can be cleaned using a mild dishwashing liquid and then rinsed thoroughly.

Please refer to your instruction manual for more.
[/QUOTE]

Manual: https://www.zojirushi.com/servicesupport/manuals/manual_pdf/smkhe.pdf

Jason · Answer

Wash out with warm soapy water. A toothbrush could help in the scrubbing. While still wet, add baking soda into the flask and scrub. 
Pour an inch or two of white vinegar into a clean carafe, then fill most of the way with hot tap water.
Not tried this one, but seems a few people have had good results. 4 Alka-Seltzer tablets with water. 
Adding freshly ground coffee, which will help to mask the smell if it is still there.

Edit: 
Just read through the manufacturer's instructions, and have updated my advice as a result.

How to get Garlic & other strong Spices' smell out of my Zojirushi Flask/ Thermos acquired via a herbal Immunity decoction?

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