The water-based ink is perfect for sketch and notebooks because it does not bleed out or through most papers

UP43 focuses on the young Stockholm train painter Sick from BST

picking up color either from a marker tip or a palette and carrying it onto the page

If you want more options

tombow empty water brush pen medium Moss The water-based ink is perfectThe Medium is the most general purpose tip in Tombow's water brush range a round head that widens into a broader stroke under pressure or tapers to a finer point when held lightly, covering both background shading and tighter detail work without switching tools. That range is part of why it's the most commonly reached for tip in bullet journaling and hand lettering specifically, since most pages mix both jobs: blocking in a banner and writing fine