Tonic water is clear but bitter, so tradition reads it as an honest, sobering truth and as something that cleanses even when it is not sweet.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.