Hydrogen has a solid metalic phase at standard temperature, you just need a few skyscrapers of pressure and a container that’s not made of atoms. If you want to use it partwise, you also need a valve with a seal that’s also good for a few skyscrapers of pressure that’s also not made of atoms, and your non-atomic container has to be able to shrink to maintain compression.
If you hold anything too close to your non-atomic shrinking multiple-skyscraper valve, it gets cut in half.
If your your non-atomic shrinking multiple-skyscraper valve develops the slightest fault and opens a little bit too wide, it blows open and turns into a missile with tens of thousands of pounds of thrust on one end.
Other than that, no big deal.