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Premium OEM & ODM Services For Insulated Water Bottles, Wine tumbler Flasks, And Plastic Cups

How to Fix a Dented Thermos Bottle (and When to Replace)

A dented thermos is common after a drop. Whether it matters depends on where the dent is and whether the vacuum survived.

First, Assess the Damage

  • Dent on the base or shoulder: often cosmetic; insulation may be fine.
  • Dent that cracks the inner wall: vacuum lost - performance drops sharply.
  • Dent near the lid threads: may cause leaks.

Gentle Reshaping Methods

  1. Warm water + suction: fill with hot (not boiling) water, cap, and pull the dent outward with a suction cup.
  2. Wooden spoon: from inside, gently push the dent out - only on the base.
  3. Avoid freezing tricks: the old "water and freeze" method can crack the wall.

When to Replace

If the bottle no longer holds temperature or leaks, repair is not worth it. Consumer bottles are not field-serviceable.

Buying frequently? Source direct from a factory. See our drinkware or contact us. Our buying office consolidates multi-category orders.

Need a Replacement? We Manufacture Drinkware

If your bottle is beyond repair, STWADD is a BSCI-certified factory producing vacuum-insulated bottles, tumblers and flasks with OEM/ODM service from 500 pcs. Browse our drinkware categories or contact our team for a quote. Sourcing across multiple categories? Our China buying office consolidates orders into one container.

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