I think we're fine: https://youtube.com/shorts/3fYiLXVfPa4?si=0y3cgdMHO2L5FgXW

Claude invented something completely nonsensical:

> This is a classic upside-down cup trick! The cup is designed to be flipped — you drink from it by turning it upside down, which makes the sealed end the bottom and the open end the top. Once flipped, it functions just like a normal cup. *The sealed "top" prevents it from spilling while it's in its resting position, but the moment you flip it, you can drink normally from the open end.*

Emphasis mine.

He tried this with ChatGPT too. It called the item a "novelty cup" you couldn't drink out of :)