Sitting outside the ramshackle Vimba Tavern in Johannesburg's Alexandra township, Patrick Mashego swigs from a one-litre bottle of Carling Black Label, South Africa's most popular beer.
Rolled out by AB InBev across the country this year, the large bottles are part of a plan by the world's biggest brewer to lure price-conscious South Africans to its mid-market beers and away from bargain rivals or home brews.
