About Coco

So for a while, Coco had a favorite joke. I hated it. I thought it was stupid and crude and, even worse, a pun. Therefore Coco, being the kind and loving friend that she is, told it to me over and over again with a cheerful cackle. Every time I saw her I think she told me that joke.

So today, I’m at work and my labmate is telling me about his furnace and how he was having difficulties keeping oxygen out of the reaction vessel because the seals were loose. Air had got in and reacted and ruined a (not very important) experiment. So he needed a better way to keep air out with some tighter seals so it could hold a vacuum or perhaps he could flow an inert gas through the system. So today he was going work on getting a better seal.

I had to tell him Coco’s joke.
He was a little shocked and thought it was the most risqué thing he had heard me say. I think we both a little embarrassed, but the situation called for coco's joke.
So without further more ado, Coco’s joke:

Why did the walrus go to the Tupperware party?

He was looking for a tight seal.