Heineken is keeping a close watch on Lion Nathan after its Steinlager "white can" advertising campaign inched near to breaching its Rugby World Cup rights.
And the brewer - represented by DB Breweries in this country - is confident World Cup rights managers IMG will blow the whistle if its future ads go too far.
Heineken is an official sponsor of the tournament at a global level, while Steinlager is a sponsor of the All Blacks team. This means it can use its association as the All Blacks' official beer, but it can't claim any association with the Rugby World Cup.
"I think it is pretty close to the wire and we will make sure they don't step over that line," said Rene de Monchy, consumer marketing manager for DB Breweries.
The campaign harks back to 1987 when Steinlager came in a white can. A 90-second ad launched three weeks ago focuses on four All Black fans through past World Cups. One of the fans uses a white can as a lucky charm.