Its canon. Somehow.
They have fully independent AI.
I am pretty sure flavored vapor is within the grasp of their technology.
Lel Riot will never listen to the memes for their own good.
It was a Rioter who stated Graves vapes.
It's not even that far fetched of an idea when you think about it. They live in a world with magic, advanced technology and technology infused with magic. Odds are someone would have eventually come up with vape technology.