I gotta stay without drinking for the next 4 months so let me give this a try. But a gallon of water a day? That's gonna be tough...that's a lot of water.
Edit: Y'all sure the rule/game is just about a liter but someone fukked up and changed it to a gallon?
Nah its always been a gallon. Its easy after the first week. Gon flush out your whole system and u gonna feel like jesus.
Its also a great mental challenge. It starts with the water and no liquor/no sugary drinks then u automatically get motivated to do other things. Workout, take a walk/run, eat better, etc.
Truly worth it.