Qantas flight attendants will apparently be wearing All Blacks jerseys on flights as part of a Twitter wager between Qantas and Air New Zealand.

A few days before the Rugby World Cup, which aired in Australia early Sunday morning, a cheeky Twitter feud broke out between the Qantas Twitter account and the Air New Zealand Twitter account.

Qantas is a major sponsor of the Aussie rugby team the Wallabies, and Air New Zealand of the All Blacks – the two teams competing for the title.

.@Qantas So we’ve been thinking about this wager. How about you paint your planes like this? #AirlineWager #NZLvAUS pic.twitter.com/46HhWkVyi7

— Air New Zealand (@FlyAirNZ) October 29, 2015

.@Qantas OK, how about this? On Monday in the air, your crew wear our jerseys. #AirlineWager #NZLvAUS

— Air New Zealand (@FlyAirNZ) October 30, 2015

.@FlyAirNZ While black is slimming, we think it needs a golden touch. Something like this… #AirlineWager #NZLvAUS pic.twitter.com/FxADqwUsdJ

— Qantas (@Qantas) October 29, 2015

.@Qantas No we’ve been too busy sourcing @AllBlacks jerseys for your crew. Tricky, as they’re in demand @ the moment. #AirlineWager #NZLvAUS

— Air New Zealand (@FlyAirNZ) October 30, 2015

@Qantas Thank you – See you tomorrow for jersey handover + pilot briefing. Looking forward to seeing you in black. #AirlineWager #NZLvAUS

— Air New Zealand (@FlyAirNZ) October 31, 2015

The banter between the two airlines saw a wager suggested where the losing team had to paint one of its planes in the other team’s colours.