Why lacquering is required in cans ?!
Answers: elaborate answr
Because food cans are made of tin and will rust/corrode from the acids/salt/sugar that are part of the products ingredients. The lacquering seals and protects the tin from these chemical reactions without affecting the food flavor. If you have ever seen an unopened can all expanded out, it's because the sealant didn't hold and a reaction occurred. Cans have been known to explode from the gas pressures that developed from the corrosive reaction inside.
It cannot be placed inside a pastic container because it is a solvent and will dissolve the plastic eventually. So a metal can is the best bet.
I would think the lacquering would be to keep what ever food that is in the cans from tasting metallic, also to keep the metal can from rusting.