Canister

The Canister is an object that appears in Sonic Underground. It is a container used to hold Chaos Emeralds and their power.

Description
The canister is yellow with six green ridges around it to hold the lid. It is decorated with swirl like patterns with red circles. Its shape is similar to that of a bottle with "fins" for stability. The very top of the lid has a glowing green gem. Inside the canister is a larger green glowing gem.

History
Seeking a way to contain the destuctive power of a broken Chaos Emerald, Knuckles the Echidna sought his great-grandfather Athair for guidance. Athair gave Knuckles the canister and advice him to form an allegiance with Dr. Robotnik.

Knuckles betrayed his friend to ally himself with Dr. Robotnik, but Robotnik betrayed him. Eventually the Sonic Underground and Dr. Robotnik agreed in order to stop the chaos, they must all work together. When Dingo spat out the pieces of the Chaos Emerald, Knuckles quickly caught the fragments in the canister which stopped the chaos from doing further harm to Mobius.