cleaning - How to clean tea stains from a mug with steel interior? - Seasoned Advice
Amazon.com: AGRATU Thermos Bottles for Hot and Cold Drinks, 316 Stainless Steel Coffee Thermos for Women, Easy Clean Thermos, Suitable for Drinking Coffee Tea Water Milk,12-Hr Insulation (19.6 oz Light green): Home
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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
How To Clean Steel Flask From Inside At Home / Easy Ways To Clean Flask / My Home And Kitchen Tips - YouTube