public void DisplayMilkChoice(bool isValid)
        {
            if (isValid)
            {
                Console.Write("\tWould you like some milk with that? : ");
            }
            else
            {
                MilkOptions milkOptions = new MilkOptions();
                var list = milkOptions.GetMilkOptionList();

                foreach( KeyValuePair<string, bool> kvp in  list )
                {
                    Console.WriteLine("\t{0}",  kvp.Key);
                }

                Console.Write("\tThat is not a valid option please enter a value from the list above? : ");
            }
        }