How to Remove the Smell from a Stainless Steel Thermos

Baking Soda and Water

• 1). Rinse the stainless steel thermos with warm water to remove any residue.
  
  
• 2). Pour 1 tsp. of baking soda into the thermos.
  
  
• 3). Fill the thermos with warm water. Let it sit for 30 minutes or overnight for best results.
  
  
• 4). Rinse the thermos with warm water. Add the baking soda and water mixture to the thermos again if the odor remains.
  
  

Baking Soda and Vinegar

• 1). Add 1 to 2 tbsp. of baking soda to the thermos.
  
  
• 2). Pour 1 cup of white or apple cider vinegar into the thermos. The vinegar and baking soda will foam. Close the lid tightly.
  
  
• 3). Shake the stainless steel thermos. Pour the solution into the sink.
  
  
• 4). Rinse the thermos well with clean water.
  
  

Crumpled Newspaper

• 1). Pack crumpled newspapers into the thermos.
  
  
• 2). Close the lid of the thermos. Let it sit for two to three days to allow the newspapers to absorb the odor.
  
  
• 3). Remove the crumpled newspapers.
  
  
• 4). Wash the thermos with warm, soapy water. Rinse it with clean water.