photo credit: www.muji.eu
These Hex Double-Ended Pens from Muji are among my favorite felt-tip pens along with my trusty Stabilo ones. I love how you get both the fine and thick lines in one pen! Both brands take forever to dry out as long as you put the caps back on when you're not using them.
They're great for taking down notes and making exam reviewers. I'm already in grad school, but colorful, grade school-ish study habits still work for me!