Cotton ball fungus

"Diana, get me your Tylenol. I really need it."
"Uh, no, you have your own Tylenol."
"No, I can't use mine, there's cotton balls growing in it."
"They're not growing in it."
"Yes, they are."
"No, they put them there on purpose so the pills don't break."
"No, there's never been cotton in any pills I've ever bought."
"There's been cotton in every bottle of pills I've ever bought."
"Well I've never seen it before. I'm not using them."
"No. It's normal. They're fine."
"At least give me your Tylenol so I can go outside and ask the pharmacy."

(I didn't. I asked the pharmacy instead. They laughed.)