The parents of two Australian teenagers who died in Laos last year have begged for Australians to remove the destination from their bucket lists.

Ahead of the anniversary of their daughters’ deaths, Holly Morton-Bowles and Bianca Jones’ parents slammed the Laos government as “corrupt” in an interview with the Herald Sun.

They also claimed there’s no evidence police have investigated the tragedy.

Best friends Holly and Bianca, both 19, were on the trip of a lifetime in the tourist town of Vang Vieng in November last year when they accidentally consumed methanol.

The pair died alongside four other tourists staying at the Nana Backpackers hostel.

The colorless, odorless poison can cause serious illness and can be fatal if just 0.85 fluid ounces are consumed.

Shaun Bowles and Samantha Morton said they were disappointed in the investigation so far, saying: “We recognize how corrupt and unhelpful the Laos Government (is), there is no evidence whatsoever to suggest there is any type of investigation going on.

“(Our) hope is that Australians remove this country from their bucket list, your life is worth nothing over there and we have seen this first-hand as well as other families that have been involved in this tragedy.”

Victorian premier Jacinta Allan acknowledged that the parents’ frustrations were “very real” due to the lack of “change happening at the end of the Laotian investigation.”

Meanwhile, Mark and Michelle Jones said “to date, no individual or organization has been held accountable” and noted that it “appears these deaths of innocent young women may be forgotten, brushed aside and left unresolved.”

Chatoulong Bouasisavath, the Laos ambassador to Australia, did not respond to questions from the Herald Sun.