Water and green tea are freely available during all cycles. Coffee is allowed in moderation with no more than four cups per day permitted, sugar and honey is not allowed however.
Sodas and juice should also be exchanged for water or a soda water with freshly squeezed lemon. Alcohol in moderation is slowly introduced in cycles three and four.
The 17 day diet book recommends that you drink green tea with all meals and hot lemon juice first thing in the mornings.