Apple Pencil with Macbook Pro 2020

Some time ago someone asked about using Apple Pencil with the Macbook Pro. They answered that you couldn't but you could use some sort of styus but didn't really clarify. Here's the answer to the original question:

"As of right now Apple Pencil is not designed to be used with magic track pad. Apple does have a patent pending on the integration of the two though. If you want to use a stylus on track pad you can buy the touch stylus with the rubber bouncy tips to draw on Magic Trackpad or MacBook trackpads."

What stylus was being referred to here?