Corrie McKeague's mother says she is "infuriated" after discovering the bins at the site where her son went missing are not locked.
Mr McKeague was 23 when he vanished after a night out in Bury St Edmunds in September 2016.
An inquest held last year concluded that the airman, who was based at RAF Honington, died after getting into a bin which was tipped into a waste lorry.
Mr McKeague was last seen on CCTV at 3.25am on September 24, 2016 entering a service area behind a Greggs shop in Bury St Edmunds town centre.
His body has never been found, despite extensive searches at a landfill site in Cambridgeshire.
His mother Nicola Urquhart has now called on Biffa, the disposal company which transported the bin Mr McKeague was believed to be in, to introduce more secure locks.
Biffa said its staff undergo "regular" training refreshers and the company was comitted to protecting members of the public.
After Mr McKeague's inquest at Suffolk Coroners' Court, a prevention of future deaths report by senior coroner Nigel Parsley said "ineffective bin locks" contributed to Mr McKeague's death.
Mr Parsley said the inquest was told that bin locks were designed to "keep waste within the bin, keep inclement weather out, but were not designed to keep individuals out".
"The locks were described as not robust, and a determined or strong individual would get in," said Mr Parsley, in the report.
"Due to their design the locks were also frequently broken.
"Stronger locks – such as snap locks – had been considered, but due to the risk of entombing – an individual inadvertently becoming locked inside a bin – stronger locks had been discounted.
"However, the court heard there are currently no stronger bin locks available which would allow an individual to open them from the inside should they become entombed in a bin."
The prevention of future deaths report also noted there had been 740 reported incidents of people in bins over a six-year period, which would likely be reduced if locks were used.
The inquest jury concluded Mr McKeague died as a result of "compression asphyxia in association with multiple injuries", as well as being contributed to by "impaired judgment due to alcohol consumption".
Since last year's inquest, Biffa has introduced stickers on its bins warning people against getting inside them.
But Mrs Urquhart believes only the use of locks would prevent them from being opened.
She said: "Since Corrie went missing and police searched the landfill, every time I would go round the bins were unlocked.
"The coroner's report said that the business needs to look at aspects of this. I perhaps naively thought they would do something to negate this risk.
"When I saw the bins were unlocked I was sick to my stomach that this is Biffa's response to someone dying.
"That they think it is a proportionate response, it just infuriated me.
"They know there is a real and present risk that someone might be in a bin. But if a bin is locked, no one would climb in it."
A Biffa spokesman said: "As a waste management company with operations nationwide, the health, safety and wellbeing of our employees, customers and members of the public is of critical importance to us.
"Our drivers undergo regular refresher training on the risk of people in and around bins.
"People seeking shelter in bins presents a challenge to the whole waste industry and we continue to work with our partners, colleagues and customers to address this issue."
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