I finally got around to publishing my recipe / instructions for "Tub Mate" on Instructables.
For those unaware - Yerba Mate is a caffeine containing plant used similarly to tea or coffee by many South American cultures.
I have become a fan of a carbonated soda version from Germany - Club Mate - and decided to take a stab at brewing my own.
This version of mate is carbonated using a very small amount of dry ice as opposed to the usual equipment.
Check it out:
Please follow the instructions - otherwise you might die.