2025 New Double Drinking Bouncing Cup Shining Design With Popped Open Lid

There are many kinds of stainless steel materials, of which 18/8 means that this stainless steel material contains 18% chromium and 8% nickel. The materials that meet this standard meet the national 304 standard and are green and environmentally friendly products, and the products are rust-proof and corrosion-resistant.

Material Preparation: High-quality stainless steel sheets are selected for durability and corrosion resistance. These sheets are cut into precise sizes for different components like the inner/outer shells and lids.

Shell Forming: The cut steel sheets are shaped into cylindrical shells using stamping machines. The inner and outer shells are formed separately, with the inner shell requiring stricter precision for vacuum insulation.

Vacuum Sealing: The inner and outer shells are welded together at the mouth, leaving a small exhaust port. The assembly is then heated in a vacuum chamber to remove air, after which the port is sealed to create a vacuum layer that minimizes heat transfer.

Surface Treatment: The flask undergoes processes like polishing, painting, or printing to achieve the desired appearance. Some models may add an anti-slip coating or decorative patterns.

Quality Testing: Each flask is tested for vacuum tightness, pressure resistance, and heat retention. Leakage or insulation failures result in rejection.

Final Assembly: Lids, gaskets, and accessories are attached. The completed flasks are packaged and ready for distribution, ensuring they meet standards for daily thermal insulation needs.

1. Do not store any drink for a long time

Whether it is water or beverages, they are fresh and healthy. It is okay for office workers to use the 304 stainless steel vacuum flask to pack milk, Chinese medicine, etc. to go out for emergencies, but they still need to pay attention to drinking them as soon as possible.

2. Always clean the sealing ring of the cup lid

Many people think that the vacuum flask has a good seal and is not easy to be polluted. However, they do not know that the sealing ring of the cup lid is a breeding ground for bacteria, which can easily contaminate the water in the cup, so it is better to clean it frequently. Usually do not use a steel ball to scrub the inner liner of the stainless steel vacuum flask. For difficult-to-remove stains, you can rinse it with a neutral detergent, or wash it with diluted vinegar. The washing time should not be too long, so as not to damage the passivation film.

3. Let the water cool down and put it in the thermos

No matter which vacuum flask is used, it is recommended that you do not pour the freshly boiled water directly into the vacuum flask. You can choose to drop the water temperature below 70°C before pouring it into the vacuum flask.

4. Have you really washed your vacuum flask?

How to clean the stainless steel vacuum flask cleanly, don't worry if there are odors and stains, baking soda, toothpaste and salt water are all cleaning tools!