Thank you for contacting Thomson and Island Cruise.
Drinks packages can only be added for all or non of the party as per our booking terms and conditions. For future reservations we would suggest making 2 separate bookings which would ensure the 2 passengers wishing to have a drinks package could and not affect the 2 passengers that don’t.
Not very helpful customer service, anyone would think you were trying to pay less! Hmmmm future bookings? Rather presuming are we not?