Memory Canister

A "" is a tube primarily used by the Blind Eye Society to contain the memories taken from any witness of the supernatural after it has been removed by using the Memory erasing gun.

History
It's never specified when or how the tubes were created, but they have been in use ever since the society was operational.

Whenever a person had their memory taken from them, the tubes were used to contain the memories and were then taken to the "Hall of the Forgotten", a special room where all the memory tubes containing each and every memory landed.