Since he mentions a "token", I don't think he means the recycling system, but rather than whenver you visit a festival/sports events etc., you typically have to pay a deposit of €2 for the cup your drink is served in. Before you leave you have to return the cup for a refund.

Sometimes you also get issued a "token" and the refund is only possible with the token, so you can't return other cups you find lying around.