19172 Lightening Blue HL

The 3 oz bottle lasted me through an entire semester of note-highlighting, which surprised me. The ink flows smoothly without bleeding through standard printer paper, and that lightening blue really makes key sentences pop off the page.

The fluorescent blue is so vivid it practically glows on the page, and I only need a light swipe to make my notes pop. It dries fast enough that I can flip pages without smudging, which is a huge win for my study sessions.

This bottle lasts forever since a few drops mixed with water are plenty for a whole page of notes, and the blue really pops without bleeding through cheap paper. I've switched from dry highlighters and won't go back.