KSI landed on some of the greatest free advertisement of all time when President-elect Donald Trump sipped from a Prime bottle. The YouTube superstar's brand with former boxing opponent-turned ...

KSI did admit that the two Prime founders are "very good at marketing ... "And we've seen it during Black Friday where people have been [fighting] over TVs in supermarkets." ...

However, it turned into a moment for KSI and Logan Paul when Trump was seen sipping Prime Energy. KSI later responded with just two words, adding to the buzz surrounding the already star-packed event.

Logan Paul and KSI's Prime Hydration brand is entangled ... the suit claims that the black "X" logo featured on Prime X bottles infringes upon X Hydration's federally registered logo trademark ...