How to keep a stainless steel thermos bottle vacuum

1. Special lids
Some stainless steel thermos lids have airtight rubber pads that can help maintain a vacuum state. Before use, you can soak the bottle and lid in hot water to increase the softness of the rubber pad and make it seal better. When using, tighten the lid firmly to ensure that the rubber pad fits tightly against the bottle mouth.

2. Correct usage
When using a stainless steel thermos, we must master the correct method. First, heat the bottle before pouring in hot water, tea or coffee. You can heat the bottle shell with hot water, or soak the bottle directly in warm water. This allows the air between the inside of the bottle and the lid to be exhausted as much as possible, which is conducive to maintaining a vacuum state.

When using the bottle, you should also avoid opening the lid frequently. Because every time you open the lid, the air inside the bottle will flow in, breaking the vacuum state. If you must open the lid, try to open it only for a moment, quickly pour the liquid into the cup, and then close the lid immediately.

3. Other tips
1. Fill the bottle. To maintain a vacuum state, you need to reduce the air content in the bottle, so when using a stainless steel thermos, try to fill the liquid as much as possible. This can remove most of the air in the bottle, which is beneficial to the insulation effect.

2. Do not rinse the bottle with cold water. The inside of the bottle has expanded to a certain extent after adding hot liquid. If you use cold water to rinse, it is easy to cause the internal pressure to drop, leaking or breaking.

The above are several ways to keep the stainless steel thermos vacuum flask. Whether using a special lid or mastering the correct method of use, it can help us better maintain the temperature in the bottle and extend the insulation time of the drink. When using a thermos flask, you should also pay attention to regular cleaning and maintenance to ensure the service life and performance of the bottle.