In Jordan, a ‘stunning’ discovery under Petra’s ancient stone

The cup they show isn't dated; it just says, "An ancient ceramic item discovered at the Treasury site". It's not even clear the cup was discovered during this particular expedition, or where it was found. It could be newer or older, and need not be related to the 12 skeletons.

If the 12 apostles existed, it seems unlikely that they'd all be buried in the same place, in what may have been a "prestigious" tomb. Jesus isn't exactly described as a particularly popular figure in his time when it came to the authorities, and I would expect the 12 apostles would have died at different times, in different places, and wouldn't have been buried together.

The time range is pushing it, too: between 400 BCE and 106 CE, though that's just the roughest of estimates based on when the city was founded and when it was annexed by the Romans, not based on any inspection of the remains. It feels more likely that this tomb was built, used, and sealed up well before Jesus and the disciples/apostles supposedly lived.

Even if we assume the religious fairy tales are true, this doesn't pass the smell test: it's vanishingly unlikely that these are the remains of those men, or that any of this is related to the Holy Grail mythology.