Vuvuzela — the bright colored plastic horns with a monotonous droning sound became the hallmark of the World Cup soccer tournament in South Africa.

An online company has begun marketing an "Anti Vuvuzela Filter" that promises to silence the sound of the controversial plastic trumpets that have become the trademark of South Africa's World Cup.

South Africa's vuvuzela trumped the Mexican wave in the big match of the day in the stands while Mexico salvaged a late draw against the hosts in the World Cup opening gameon Friday.