Leah, I'm as blind as you, because I can't find her website listed either!
I did, however, find instructions right here on Splitcoast, while trying to google for her website
Aimee's Glitter Pens
She just wraps Terrifically Tacky Tape around the ink cartridge, rolls it in glitter and then puts the cartridge back into the pen. I think the pink pen looks "fuller" because she used chunkier glitter.