Item #2 on his list: Fountain pen. I wonder what color ink he prefers.

What Bill Nye Can’t Travel Without

“I almost always have a fountain pen, and I carry ink for it. I like the clear one from Lamy. If you’re signing somebody’s book or an autograph, it just has a certain charm.”

https://www.nytimes.com/2017/04/13/travel/what-bill-nye-travels-with.html