Oughtn't to be kept chilled for more than six hours, alas, so what I am currently doing (though I need to work out how to wrangle this for tomorrow, when I will be In Lab) is making it up when I'm having a meal, sticking it in the fridge, and then drinking it an hour after said meal, which does at least cut down the executive function some while also meaning the stuff is good and cold.

(Milestone: managed to drink it without cordial today, chilled, without gagging.)