1. Keep hot and cold
Heat preservation and cold preservation is the most basic function of the heat preservation lunch bag. It is a special kind of bag with a short-term heat preservation effect. It can keep cold/heat preservation. The product heat preservation layer is pearl cotton + aluminum foil tin foil, which can provide a good heat preservation effect.
2. Durable
It must have excellent impact resistance, not easy to break under heavy pressure or impact, and will not leave scratches.
3. Seal
This is the primary consideration when choosing an insulated lunch bag. Although different brands of products have different sealing methods, sealing is a necessary condition for the long-lasting preservation of food in memory.
4. Keep fresh
The international sealing measurement standard is evaluated by the moisture permeability test. The moisture permeability of high-quality insulated lunch bags is 200 times lower than that of similar products, which can keep things fresh for a longer time.
