A egg!
overall
outside of the box
She opened the box of emotions and only hope stayed inside the box.
outside
top to bottom
One of them is I am a box without a lid, inside a golden treasure is hid. The answer is an egg.
When Pandora opened the box that Zeus gave her, she released all the evils and miseries into the world, leaving only hope inside the box.
map
It's an EGG!!!!Why? Because an egg is like a "treasure chest" whose "golden treasure" is the yellow yolk inside it. And yet this "chest" has no hinges, key, or lid.
The resonator box is not meant to be opened. It is fused together as there are no serviceable parts inside of it.
an egg ^^
Treasure Box was created in 1996.