The containers are made of AISI 304 (1.4301) with thickness and design aimed at guaranteeing resistance to air extraction; furthermore, the particular heat treatment (recrystallization annealing), combined with the excellent polishing, as well as the type of stainless steel used, give the container excellent resistance to corrosion. Containers: The vacuum is obtained through a pump which extracts the air present in the container allowing the "rarefaction" of oxygen, a vital gas for humans, but also for microorganisms such as bacteria and mould. Their proliferation is therefore blocked and fermentation activities are therefore inhibited. Preservation in vacuum-packed containers allows you to significantly reduce and delay food deterioration (loss of flavour, browning of fruit, etc.). In economic terms, vacuum preservation is a great advantage as it allows you not to consume the dishes prepared and left over the same day, guaranteeing the same quality of the product (freshness, taste, safety, etc.). Finally, we remind you that stainless steel containers are the more suitable for the conservation of those food products which would risk being crushed in vacuum bags.