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How to Clean Your THERMOS® Flask Lid

How to Clean Your THERMOS® Flask Lid

How to Clean Your THERMOS® Flask Lid

  1. Disassemble the Lid
    Carefully take apart the lid components — including rubber seals and inner caps — so every part can be cleaned thoroughly.
  2. Prepare a Vinegar Solution 
    Mix 1 part white vinegar with 10 parts water in a bowl or basin.
  3. Soak All Lid Parts 
    Submerge the disassembled parts in the vinegar solution. Let them soak for 10–15 minutes to naturally neutralize odours.
  4. Rinse Thoroughly 
    After soaking, rinse all parts under clean water to remove any vinegar residue.
  5. Wipe Clean & Dry 
    Use a soft cloth or towel to wipe down each piece and allow everything to air dry completely.
  6. Reassemble Carefully 
    Once dry, assemble all parts back in their correct positions. Make sure everything is fitted securely to maintain the lid's performance.