A lid for an opening device for a container includes a body having a longitudinal axis and provided with an end wall and with a side wall internally provided with a thread element suitable for cooperating with a further thread element of a spout of the opening device, the lid further includes at least one driving element having a first side arranged to receive the fingers of a user during unscrewing of the lid from the spout and a second side arranged for receiving the fingers of a user during screwing of the lid on the spout, the first side being defined by a wall and the second side being defined by a cavity.