We religiously use raspberry syrup when going to Bali and have never had a problem with the tummy - not sure if it is just lucky or not. However for this flight we booked carryon luggage only and with the 100ml fluid allowed to take on we have stuffed up. Jetstar wanted $80 each extra to upgrade to checkin luggage so we are hoping we can buy the syrup in Bali somewhere. Any help greatly appreciated. thanks