1、Easy to use just place the lid on the food touch the smooth plate and gently press the top of the lid to form a vacuum seal. 2、It has a wide range of applications and can be used in dishwashers or in microwave ovens which is very convenient. 3、Easy to store the vacuum preservation cover can be stacked for storage occupies a small area and saves use space. 4、Durable made of high?quality ABS+silicone+environmental protection film material BPA?free can be used for a long time without worry. 5、By vacuum sealing them make your leftovers taste as good as the day you made them.