I assume that was to symbolize that he was done with being a part of the Vichy French state headed by Marshal Philippe Pétain that collaborated with Nazi Germany. He then tells Rick that he will likely go with him to join the Free France movement.
shareWas that a bottle of water? Why would he be carrying that around? I assumed it was a bottle of liquor, then he decided to stop being an alcoholic and start working to be a positive change, with the Free France thing.
shareOP is more than likely correct: it clearly is marked Vichy Water, and was most probably available for the taking by the phone. He kicks it away in a message to himself that he is done with the Vichy government, Major Strasser-types, and blowing with whatever the prevailing wind happens to be.
shareOh. Also, that bottle was already there. Renault wasn't carrying it around. It would have been handy for whoever was working there.
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