Nothing is special about it, it has just been marketed and promoted by KSI and Logal Paul so all their fans feel they need to immediately have it. I'm sure in a few days the hype will die down and no one will care much anymore.
What's so special about this prime drink, my sister had it and its made her really ill? Anyone else had it?
That's rough about your sister not feeling well after trying that Prime drink. I remember my cousin had a similar reaction to a different energy drink once. Sometimes certain ingredients just don't sit well with everyone. Maybe it was too much caffeine or something else in it.