1. It is not recommended to store liquid or powder articles in the tank. (Because there is a vacuum valve in the sealing cover, water or powder may enter the vacuum valve in the cover when the tank is dumped, which may lead to the blockage of the valve and affect the vacuum effect.) 2. The height of the articles stored in the tank: it is recommended to be lower than the bottom of the "sealed cover" by 1cm. It is recommended to press for 20 times to obtain better vacuum hypoxia storage effect when vacuum pumping is carried out. 3. In order to a better storage effect in the tank for a long time, it is suggested that the air extraction valve on the top of the sealed lid can be pressed several times every 7-10 days to obtain a better vacuum and low oxygen storage environment in the tank. 4. It is suggested that the hot food should be placed at room temperature before being covered with a sealing cover for pressing and pumping. 5. During daily use, please don't be close to flames to avoid strong impact, so as not to cause product deformation and affect the use effect. Heat resistance temperature:-20-150 Washing instructions: 1. Please clean the glass tank before using the product for the first time. (The glass tank can be placed in the dishwasher for cleaning) 2. The "press-type vacuum sealing cover" cannot be soaked or washed in water, but can be wiped with a wet cloth. (Because there is a vacuum valve in the cover, if water or powder enters, the valve in the sealing cover may be blocked and the vacuum effect will be affected.) 3. In order to better the service life of the sealed tank, when cleaning the glass tank, do not use hard washing tools such as steel balls for cleaning. Capacity:500Ml Colour:Black Material:Glass Size:10.5x10cm Package Contents: 1 * Jar Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.