Here's a new one on me. Apparently there's a tea known as chifir that's quite popular in Russian prisons for the rip roaring caffeine kick it imparts.
I did some cursory research and found various recommendations on how to prepare this delight. One version calls for 1.5 ounces of loose tea to ten ounces of water. Another calls for 3-7 tea bags cooked in one cup of water for 10-15 minutes, then flavored with milk and sugar.
Sheesh. Well, as the old saying goes - don't try this one at home. Makes me twitch just reading it.