Clingfilm

[rebbonk]

My wife called me today and said, "I'm at the supermarket, do you want anything?"

"Yes," I replied, "Pick me up some cling film."

"Any particular brand?" she asked.

"Get the box with catering cling film written on it," I replied, "It's 40 metres long."

"S*d off," she said.

Spoiler:

"How am I supposed to get on a bus with that?"