The fifth tier of act 2 in Modern Warfare Zombies will task players with tracking down three small silver containers containing samples of the essence that Dr. Jansen needs to further her aetherium research. Players will only need to locate the containers and interact with them to collect the sample, but daring the hordes and pinpointing the exact locations of the samples can be a bit tricky. If players can navigate to the containers and collect all three samples, they will be awarded a Speed Cola acquisition and 2000 experience.