I had coola cordial in a 1l jug with lots of ice had 2.5lt over a 5hr period of time. I was relly thirsty during labour and it was a good distraction. I didn't want to eat anything at all. I say whatever you like to drink normally or if you are unwell go for it.

My friend had been drinking red cordial at home and threw up when she arrived at the hospital the staff panicked thinking she had vomited up blood. So if you have been drinking anything red let your midwife know lol