Which of Hesiod's poems gives the fuller account of Pandora opening the container?

Works and Days gives the fuller account of Pandora opening the container.

Hesiod's Works and Days is a didactic poem combining farming advice, moral instruction, mythology, and reflections on justice. Its opening section explains why human beings must work and endure suffering. In that setting, Hesiod tells how Zeus sent Pandora to Epimetheus after Prometheus obtained fire for humanity.

The poem describes a storage jar containing evils. Pandora removes its lid, and the evils spread among humans. She closes it before Hope escapes. The passage is the principal ancient source for the familiar image of a container whose opening changes the human world.

Hesiod's Theogony also mentions Pandora and the creation of women, but it is much briefer about the vessel itself. The two poems are complementary rather than identical. Modern retellings often merge their details, add a warning from Prometheus, or call the jar a box, even though those features do not all occur in the same ancient passage.