Thanks, everyone! I'm going to stick with one bottle of gin. Since it will be delivered to me on the plane in a conspicuous Duty-Free bag and I wouldn't have the chance to put it into my checked bag till we got to the Baggage Claim Hall, there would be too many ways for someone to enforce the rules. They could report seeing me put it into my suitcase after I retrieved it, or X-ray my carry-on if I tried to hide a second one there. Probably very little chance that I'd get caught, but I won't want to deal with Indian law enforcement of any kind at 10 PM after coming off a 14-hour flight. And just declaring the second bottle and paying duty kind of eliminates the cost savings!