How to Remove Odors From a Thermos

A classic lunchbox accessory that keeps liquids both hot and cold, thermoses are a common sight in schools and workplaces. Since thermoses hold a variety of drinks and foods -- such as coffee and soup -- it is not uncommon for the odors and tastes of previous contents to linger in them. These lingering odors can affect the flavor of liquids stored subsequently in a thermos. You can quickly neutralize such odors using common household items.

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Thermoses are available in stainless steel and plastic.

Step 1

Fill a sink with warm, soapy water. Place the thermos inside the water and let soak for five to 10 minutes.

Step 2

Wipe the inside of the thermos with a cloth dampened in the soapy water. Rinse the thermos clean with cool running water.

Step 3

Pour 1 to 2 tbsp. of baking soda in the thermos. Add 1 cup of white vinegar and secure the lid on the thermos. Vinegar is an all-natural cleaner and deodorizer that can remove tough lingering odors inside a thermos.

Step 4

Shake the thermos for several seconds. Remove the lid and pour the contents down the drain.

Step 5

Rinse the thermos with cool running water and let it air dry. Repeat the process as needed.