IDFC First Bank's Forex Card is free to get which can be used globally (except India, Nepal, Bhutan).
The card is open to all for applying with minimal documentation required.
You can apply online or at a branch. Instant issuance for generic cards, and personalized cards take 7 business days.
There are no issuance or reload fees, but currency transfer fees apply.
Unused currency can be encashed upon return to India.