Early to middle tinned copper 20th c Indian betel box for betel nut goods, nuts leaves spices etc, not a picnic basket...It would be accompanied by a nut cutter and a crusher and other tools. The white powder on the tool is lime, used in preparing the chew. Cutters were often decorated, I've even seen a gold handled upper class Mughal one.
More than most of you want to know:
https://www.youtube.com/watch?v=LcUFAu7D6QU
It also turns user's teeth red & can cause mouth cancer.