Liquor is banned in IR Trains as a rule. If you allowed at Originating stn to take that with you , but how Rly will understand that you are not going to consume it onboard Train ? That's the whole scene why it's banned on Trains. Liquor is Liquor , no matter what percentage of alcohol is in it.. IR will still treat as under Liquor... yeah instances are there that people consume it on board by bribing but situation are always diff,,