Which mythological container was specifically designed with a unique feature that prevented its contents from completely escaping, thereby preserving hope for humanity?

In mythology and folklore across cultures, certain containers and vessels were believed to hold extraordinary power or divine contents. These ancient 'packaging designs' weren't just functional—they were imbued with magical properties, curses, or blessings. From Pandora's Box to the Holy Grail, these mythological vessels represent some of the earliest examples of how packaging itself can tell a story and create value beyond the contents. Test your knowledge of these legendary containers that have inspired modern product packaging concepts!

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Pandora's Box, which had a small compartment at the bottom that trapped Hope inside while all other evils escaped
The Golden Fleece, which was designed with magical fibers that could selectively filter beneficial elements from harmful ones
Mimir's Well, which had a special rim that prevented the waters of wisdom from being completely drained
The Cornucopia, which contained a hidden chamber that stored the essence of abundance for future generations