During the pressing procedure, the piston located inside the vacuum bottle will move up inside the bottle. Once all the contents of the vacuum bottle have been extracted, the piston will reach the top of the bottle.
If you've finished using the contents of the bottle, simply take out the pump head from the vacuum bottle. Push the piston down with a sturdy object until it reaches the bottom. Then, put the vacuum bottle back together for future use.
A vacuum bottle is designed to create a barrier between the inside contents and the external environment. By isolating the contents, it prevents any contact with outer air and possible oxidation. The vacuum bottle utilizes a spring to create a forceful contraction that keeps air from entering the bottle. Additionally, atmospheric pressure plays a key role in pushing the piston at the bottom of the bottle forward to further prevent outside air from entering. Therefore, a vacuum bottle is a remarkable storage device that can isolate gas and protect the contents from external contamination.
It is important to note that while a vacuum bottle is re-usable, it should be replaced periodically to avoid prolonged usage that can cause contamination. Additionally, be cautious when dismantling the bottle to prevent foreign materials from entering.