Clinique Chubby Sticks!
Here is a little review of of the Clinique Chubby Sticks which I believe were the original lip crayons.
I received this one free in a Glamour magazine a while ago and have been loving it recently. It adds a base colour and can be paired with pretty much any shade over the top.
I would recommend using lip balm beforehand but other than that the formula is very rich and opaque as you can see below with just one layer on my lips.
Have you tried this product out?