Metro's main competitor IGA already has its own alternative single-use plastic program in place, while the Provigo chain prefers to wait until there's a safe mechanism to ensure the food idoesn't get contaminated in containers brought from home. The zero-waste alternative is also unavailable at Super C, which is owned by Metro. Companies are listening, say zero-waste groups Metro's announcement was welcomed by the administrator of a zero-waste advocacy group, who says its proof that companies are listening to consumers who are increasingly demanding eco-friendly options.