Cardboard box shell
The cardboard box shell is a shell created by SpongeBob from a cardboard box for Gary. It appears in the episode "Shell Shocked."
Description
It is a cardboard box with spots and a spiral which was drawn by pencil.
Role in episode
After SpongeBob destroys all of the shells at Angry Jack's Shell Emporium, SpongeBob sees a cardboard box and gets an idea to make a shell for Gary. He draws a spot and spiral to look like Gary's old shell.