The world is mostly safe now, but everything has been scavenged from the old world. I live where winter always reached -20F or lower outside. Our colony has a hundred people and a few working electronic devices, no one else is better off.
The last of my scavenged coffee is running out. I am open to anything but caffeine is needed in my morning ritual.
How can I get enough caffeine to replace my 16oz of coffee a day without being able to purchase/scavange it?