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Water bottle lids, gaskets and straws: wash separately, dry fully

THERMOS notes that gaskets and straw components can trap moisture and drink residue. Clean only parts designed to be removed, rinse well, and let everything dry completely before reassembly.

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THERMOS's March 27, 2026 bottle-care guide recommends airing with the lid off and periodically cleaning the cap, removable gasket and straw. Integrated seals should not be forced out, and dishwasher compatibility depends on the product's own manual.

Your try-it-at-home checklist

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Empty the bottle after use and rinse the interior with lukewarm water. Let any remaining hot drink cool before handling.
Separate the lid and body. Remove only the gaskets and straws the manufacturer allows you to detach; never pry apart an integrated seal.
Use a soft bottle brush and mild dish soap on the interior, lid channels and removable gasket. Use a narrow straw brush through the full straw.
Rinse each component thoroughly with clean water and check grooves for detergent or beverage residue.
Air-dry the bottle, gasket, lid and straw fully before reassembly. Do not store with a wet closed lid.
If seals are cracked, deformed or still smell after proper washing, consult the maker about compatible replacement parts. Follow the model manual for dishwasher, heated drying and bleach restrictions.

Your try-it-at-home checklist

Further reading

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