What are possible ways to use conch shells? Explain How?

I just read about a conch shell yesterday. Read the Lord of the Flies by W.Golding. In the story, the boys blow the conch shell as a signal that a meeting is going to begin. If a boy had the conch, his turn to talk. "in colour the shell was deep cream, touched here and there with fading pink.Between the shell lay eighteen inches of shell with a slight spiral twist and covered with a delicate embossed pattern."