How much caffeine have you taken in a day?

I've been hearing Pat talk about this TikTok of a lady who drank 9 sugar free monsters, and I could feel my heart palpitate with the thought.

I can barely handle a can and a half, much less 9 of them.

And I'm a fucking Programmer we run on caffeine.

Do people usually do this? What's the most caffeine you've drank in a day?