If sodas are a part of your diet problems, meaning you really like coke, 7Up or other soft drinks, (that carbonny fizz is a real pleasure at times), you could try substituting tonic water. I add a little bit of tonic water to my regular drinking water and find no real want for the soft drinks much. About a one to ten ratio, one ounce of tonic water to every ten ounces of plain water.

I hope you and your father continue in a healthy recovery.