Sharpie Permanent Markers, Ultra Fine Point, 12 Count – Link

Amazon has this currently on sale for only $6.16.

• Proudly permanent ink marks on paper, plastic, metal, and most other surfaces
• Intensely brilliant colors create eye-popping, vibrant impressions
• Remarkably resilient ink dries quickly and resists both fading and water; AP certified
• Endlessly versatile ultra-fine point is perfect for countless uses in the classroom, office, home, and beyond
• Colorful options: Includes 12 Black Sharpie permanent markers