From this source.
- Coffee, tea, colas, energy drinks
- Fioricet®, Cafergot®, NoDoz®, Excedrin® Extra Strength
- Plants: Guaraná, Yerba Maté, Cola nut (Kola nut), Cacao, and all the coffee/tea plants.
After raiding abandoned stores (after the apocalypse, right?), the only option left is to grow your own
