Firstly I would like to say thanks to all the experts and regulars on this forum for the advice they have given to other travellers . They have made planning our trip so much easier and we will go armed with local knowledge we wouldn't have had otherwise.
On 11th October, after 5 nights in Fes, we will be taking the train to Marrakech. As we will probably be sharing a compartment with locals who are fasting we would obviously prefer not to eat in front of them, which shouldn't be a problem, but I know that I will need someting to drink during the journey. Have you any advice on how to do this without offending anyone short of going to the loo for a swig from my bottle of water ?