I've said this on the forum a few times now, but he honestly just needs to suck it up (man to man here/tough love). I drank a minimum of 60 oz of soda per day. It went down something like this: 44oz soda from the corner store in the morning to get me to lunch. Water or a 20oz soda at lunch. One or two 12 oz sodas at home in the evening.
I took to Spindrift my first Whole30 and also found a compliant Spearmint Hot Tea to give me a bit of caffeine help. I had horrible headaches for a few days but then the SpinDrift and Water alone were fine. By the end of my first Whole30 I could no