class Drink
  def sip
    puts "You drank with caution"
  end
end

class Coffee < Drink
  def method_missing(method_name, *args, &block)
    if method_name == :gulp
      puts "Please don't gulp your coffee!"
      sip
    else
      super
      # this will do the normal thing of raising an exception that the method wasn't found
    end
  end
end

class Water < Drink
  def gulp
    puts "You drank the water with reckless abandon!"
  end
end