Cardboard box shell
Cardboard box shell is a shell, that created by SpongeBob from cardboard box for Gary. Appears in episode "Shell Shocked".
Description
It's a cardboard box with spots and spiral, which was drawn by pencil.
Role in episode
After Angry Jack's Shell Emporium, when SpongeBob destroyed all shells and Angry Jack get so angry, SpongeBob sees a cardboard box and get idea, make a shell for Gary. He draws a sport and spiral, to looks like old shell.