Juice up your notes with pilot's juice gel ink pens. The juice series is a collection of brilliantly colorful pens, all of them containing pigment-based water-resistant ink. The pens can write on most photographs, and the pastel and metallic colors are fun to try on dark papers. Attach your pen to your notebook using the sturdy spring-loaded clip. Or if you prefer, string a chain through the hole in the clip, then hang the pen from your bag or attach playful charms.