1. Cannot hold specific beverages
(1) Corrosive beverages: Chemical reagents with strong corrosiveness such as hydrochloric acid and sulfuric acid should never be stored in thermos cups. They can seriously corrode the inner lining of the thermos cup, not only causing it to be scrapped, but also posing a danger.
(2) Fermented drinks: In addition to the milk and soybean milk mentioned above, yogurt and other drinks rich in protein and sugar should not be kept in a warm cup for a long time, because under the appropriate temperature, microorganisms will multiply in large numbers, leading to fermentation and deterioration of drinks, which may lead to diarrhea and other problems.
2. Inappropriate operations are not allowed
(1) Severe collision: Do not drop, hit or scrape the thermos cup with hard objects at will, as this may deform or damage the inner liner of the thermos cup, destroy its vacuum insulation layer, and reduce or lose its insulation performance.
(2) Open flame heating: Do not heat the thermos directly on an open flame, as the thermos is not designed for direct heating and may cause deformation, damage, or even danger to the cup body.
(3) Strong pressure opening: When the thermos is filled with hot water and the lid is tightly screwed, do not forcefully open it. Because the cooling of hot water in a closed space can create negative pressure, forcefully opening it may cause the cup lid to suddenly pop out, causing burns or other injuries. You should wait for a period of time or gently loosen the cup lid to release air before opening it again.
(4) Long term dry burning: If there is no water in the cup, do not dry burn it on a heating device, otherwise it will cause the cup body to overheat, damage the material, and even cause safety accidents such as fire.
3. Do not use incorrect cleaning methods
(1) Prohibit strong acid and strong alkali cleaning agents: Do not use cleaning agents containing strong acid and strong alkali to clean the insulated cup. They may react chemically with the material of the insulated cup, corrode the inner liner, and affect the performance and service life of the insulated cup.
(2) Avoid using steel wire balls or hard brushes: Do not use sharp and hard tools such as steel wire balls or hard brushes to clean the inside of the insulated cup, in order to avoid scratching the inner container, damaging its surface protective layer, and making the inner container more susceptible to corrosion.
