How many grams can an old aluminum lunch box from the 1960s hold?

The production process does not pollute the environment, the product quality fully meets the national food hygiene requirements, and the product is easy to recycle, dispose of or digest after use. The combination of this suit is small in size, easy to carry and more convenient for students to use.

Small size, large capacity, under the condition of not affecting heat preservation, the vacuum layer of overflow food tank is thinner than that of ordinary food tank, which increases its capacity. Compared with glass lunch boxes, plastic fresh-keeping boxes have the advantages of light weight, portability, easy cleaning and good sealing. Degradable plastic is generally considered as a kind of plastic that can be decomposed into low molecular weight by sunlight radiation or microorganisms in soil.