The toilet has had many different appearances throughout the series. Its seat is typically shown to be composed of bamboo, but in a few other episodes, it is shown to look like a regular toilet seat. In the episodes "Squid's Day Off," "Squid Wood," and "Pineapple Fever," Squidward has a bamboo toilet set, but in "House Fancy " and "Choir Boys," he has a regular toilet seat.
Role in series
"Squid's Day Off"
Squidward mistakes his toilet's shadow behind the shower curtain for SpongeBob, based on its similar square shape and the toilet paper rolls on top looking like his Krusty Krab employee hat.
Patrick comes running into Squidward's house, telling him that he urgently has to use the bathroom. After Patrick finishes, the toilet comes crawling out of the bathroom in agony, saying two lines before dying in Squidward's arms.
While visiting SpongeBob's house to retrieve his vacuum cleaner, Squidward finds it is renovated to look just like his house. In the bathroom, Squidward is startled to the point where he falls and bangs his head on the toilet, knocking him out.
Characters have popped out of Squidward's toilet twice.