I was looking through old photos, and suddenly remembered my disappearing upper lip. I kind of forgot why I started using a lip pump in the first place! haha:) I guess you just get used to what you see in the mirror.
My lip pump is still going strong after 2 years use, morning and night. Also, I've learned that the upper lip and small intestine are related to each other. So it's possible that dropping foods that my guts hate, like gluten and dairy, has improved the condition of my lips :)