Maintenance:  

1. When not in use for a long time, the inner tank should be kept dry.

2. In order to prevent the generation of peculiar smell and stains, please clean and dry after use.

3. Since the use of dirty water will leave red spots similar to rust, you can add warm water to dilute vinegar and soak for 30 minutes, then wash it.

There are several specific methods for the identification of thermos cups:

1. Simple identification method for vacuum insulation cup performance: Pour boiling water into the insulation cup and turn the cork or lid clockwise for 2-3 minutes, then touch the outer surface of the cup body with your hand. If the cup body has obvious warming phenomenon, it means The product has lost its vacuum and cannot achieve a good insulation effect.

2. Sealing performance identification method: After adding water to the cup, tighten the cork and lid in a clockwise direction, place the cup flat on the table, and there should be no water leakage; the screwing of the lid and the mouth of the cup should be flexible and there is no gap .

3. Plastic parts identification method: The characteristics of new food-grade plastics are small smell, bright surface, no burrs, long service life and not easy to aging. Ordinary plastics or recycled plastics are characterized by big smell, dark color, many burrs, and plastics are easy to age and break easily.

4. Simple identification method of capacity: The depth of the inner tank is basically the same as the height of the outer shell, and the capacity (with a difference of 16-18MM) is consistent with the nominal value. Some low-quality vacuum flasks add sand and cement blocks to the cup to make up for the missing weight. Misunderstanding: A heavier cup (pot) is not necessarily good.

5. Simple identification method for stainless steel materials: There are many specifications of stainless steel materials, of which 18/8 means that the composition of this stainless steel material contains 18% chromium and 8% nickel. The material that meets this standard is a green product that meets the national food-grade standard. Rust-proof and corrosion-resistant. The color of the ordinary stainless steel cup is whitish and dark. If it is soaked in 1% salt water for 24 hours, it will produce rust spots. Some of the elements contained in it exceed the standard, which directly endangers the health of the human body.