Give one to your favorite hygienist for a great tooth cleaning

give your theories room to expand within these notebooks

This dinosaur-inspired Wish You Were Here design is perfect for those whose favorite vacation spot is the dig site

This notebook is inspired by those equations that have changed our world

The Equilateral Pen Discipline_Kitchen Science Give one to your favoriteThere's something beautiful about the 60 degree angles of an equilateral triangle. Here's a metal pen that's ready for your most elegant proofs, thoughts, or musings. With a cap that snaps on with a satisfying click, take your notes to the next level with the Equilateral. Each pen comes in its own felt case. Refill it with our special . 7 mm or . 5 mm ink cartridges.