I love it in milk, only takes a little to slightly curdle & thicken up a bit. Serve over ice.
I got that idea from Twitter years ago, from interaction with a Doctor Who scriptwriter (Tom Baker era).

Especially good served hot.

// It contains the juice of grapes, raspberries and blackcurrants plus sugar (in a 3% concentration), flavoured with herbs and spices.

hazardwarning.me.