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3 Ways to Clean a Vacuum Thermosflask That Has Stains at the Bottom | Coffee thermos, Clean coffee stain, Coffee stain removal
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Cleaning a thermos bottom from coffee traces "properly". : r/BuyItForLife
How to clean your Stanley Thermos: '79 Stanley. Use 2 tablespoons of baking soda, some peroxide, add hot water. Watch years of tea accumulation disappear. : r/BuyItForLife
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