For travel, taking a "pocketbook"-sized notebook with me has always been a useful way to go. I've posted two more to nevermindtheart. Just in case you're going somewhere.
These have underpainting on the covers.
I distressed and painted the boards a solid black then overpainted just the fronts and backs, leaving the inner covers the contrasting color.
Metallic gold (red thread) or fuchsia (teal thread).
The paper is Strathmore drawing paper, the thicker version.
They are stamped "2018" on the backs.
You can get one of these two right now at nevermindtheart.
Instructions for making a miniature Coptic journal are here.
For a larger book, add more pairs of holes.
Just don't try to bind the book if you have a cat for a supervisor.