Mark Jones says the government of Laos cannot let his daughter's death be in vain, after the 19-year-old girl fell ill and died from methanol poisoning.

A second Australian teen who fell critically ill from a mass methanol poisoning in Laos last week has died in a Thailand hospital. The family of Holly Bowles delivered the devastating update on Friday, just a day after her best friend Bianca Jones passed away surrounded by loved ones.

The two Australian teenagers who have been left fighting for their lives after reportedly consuming cocktails laced with methanol while travelling through Southeast Asia have been named.

Football teammates and friends of Melbourne teenagers Bianca Jones and Holly Bowles will gather in private vigils over the next few days.

Bianca Jones died earlier this week while her friend Holly Bowles was still fighting for life when the band was on stage.

Laos government has broken its silence, following the deaths of at least 6 tourists, including two Australians.

A suspected mass methanol poisoning incident in Laos has claimed a sixth victim, the second Australian tourist to die.

Holly Bowles, 19, died hours after her friend Bianca Jones following a night out in Vang Vieng. Two Danes, an American and a Briton have also died.