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[–] 81 points 1 year ago (1 child)

Condensation. if wooden tables get exposed to it over time it ruins the wood/leaves stains

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  • [–] 11 points 1 year ago

    This is true for cold liquids. Coasters are also good for hot liquids in a cup. These can also damage a surface.

    Theoretically if you had a room temperature drink in a cup you would not need a coaster.

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