I just found my last coffee thermos and got the hypercaffeinated achievement. It was driving me nuts because I was stuck on 99 out of 100. This of course drove me to play through several times to find it. I even resorted to consulting a guide but still couldn't find that pesky last coffee thermos. Finally I started to think like a coffee thermos, or rather, I started to think like a game developer trying to hide one. I thought, if I really wanted to be annoying I'd place a few thermoses where you're going to get your ass kicked finding it and in a section of the game that most people would rather charge through instead of explore. I remembered the section right after Alan and Barry get in the second car wreck of the game. An unarmed Alan has to dodge possessed items to get to the next check point by starting a generator and swinging an overhanging lamp in position to dissolve a possessed gate. I always haul ass through that part and had never explored the area. Sure enough when I turned around and headed the opposite direction from the generator I found the platform where stood my last thermos flashing and beaconing to me. Of course when I tired to grab it I was thrashed by two possessed barrels but I got it at last! Hope that helps someone else stuck on 99. Where was your last thermos?
Quantum Break status update
Where was your last coffee thermos?