Australian methanol poisoning survivors have shared their experiences of consuming tainted alcohol after two teenagers fell ill in Laos and died this week.

The Laotian government has promised to bring perpetrators to justice after a mass poisoning that has killed six tourists including two Australians.

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.