Well, we have an answer and it may come as a surprise. The bottle is real and not only that, it is available now!
X user @CapitanCarno was courteous enough to send us not only a photo (seen below) but a full video of the bottle as well (see our embedded TikTok at the end of this video).

The bottle is Cherry Freeze flavour, so nothing new in that respect... and you can find it in Alcampo stores in Spain for the time being.