How long can the tinfoil insulation bag keep warm?

General heat preservation 1-2 hours is enough. Thermal insulation is generally used to preserve food, lunch, restaurant takeout, etc. Fresh-keeping bags, commonly known as ice bags, can be used as mobile refrigerators to keep drinks, fruits, breast milk, tea, seafood and other foods fresh. It is also used to transport drugs, vaccines and other products in cold storage.

Insulation bag:

A bag which can be used for outdoor picnics or daily life, and is used for holding various foods and keeping the temperature and freshness of the foods belongs to an outdoor bag. Ice bag is a kind of bag with constant temperature effect, which can keep cold/heat (warm in winter and cool in summer). The thermal insulation layer of the product is ultra-thick thermal insulation cotton, which has good thermal insulation effect. The product is foldable and easy to carry.