They remained trapped inside the cave complex for almost two weeks before they made first contact with rescuers from the United Kingdom at around 10:30 p.m. on Monday at about 1.2 miles deep inside the cave.
We haven't seen any reaction from Thai authorities to this idea yet, but it could provide a solution to the deadly dilemma facing Thai rescuers.
Musk explained the metal tube would be "l$3 ight enough to be carried by 2 divers, small enough to get through narrow gaps" in the cave, and "extremely robust".
But Saturday night, he tweeted that the cave was now closed for the rescue by divers. They've already been trapped for two weeks.
The billionaire entrepreneur has sent engineers to help the boys, aged 11 to 16, and their football coach who have been stuck in a cave following a flash flood for nearly two weeks.
"Construction complete in about 8 hours, then 17 hour flight to Thailand", Musk tweeted just before noon, California time.More news: LA will still be there for Paul George
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"Elon Musk will send his team to Thailand tomorrow (7th July) to help in cave rescue".
The trapped boys could be forced to undertake a perilous escape attempt underwater because a torrent of floodwater is now imminent due to heavy rain.
The Thai engineer wrote that he had helped connect Musk's companies with the Thai government.
Although they were found alive, there's no telling how long they will last as rescue efforts have been hindered by narrow passageways and rising waters.
The tubes and pods are being built in the U.S., a spokesman said.
A Thai Navy SEAL helping with the rescue operation died Friday after running out of oxygen, underlining the dangers of navigating the flooded cave system even for those with experience.
According to the publication, Musk may offer Tesla's Powerwall home batteries or technology from SpaceX or The Boring Company to help locate and rescue the team, though Thai officials have not announced whether they will use Musk's resources.