EMILY: You wanted me to get her a Filofax and a mermaid eraser.
A Filofax is a personal organiser in a large leather wallet with a six-ring loose-leaf binder; the name comes from the phrase “file of facts”. They were popular during the 1980s as an accessory for yuppies. Filofax is a UK company founded in 1921, and originally known as Norman & Hill.
This seems to be the “funky dayplanner” that Lorelai suggested that Emily buy Rory (or maybe to Emily, all dayplanners are Filofaxes). Either way, it actually seems like a good compromise between the mother’s and daughter’s tastes, as well as being useful to Rory who loves being organised. It seems a bit odd that Emily didn’t agree to it.