What's an all-natural way to plump your lips? That actually works?

rub an icecube on them for a couple of minutesWhat's an all-natural way to plump your lips? That actually works?
I read that cinnamon oil works, but I've never tried it so I can't say for certain if it does.What's an all-natural way to plump your lips? That actually works?
Lip fusion lip gloss. It costs like 50 dollars, but it works!! they have it at sephora, or sephora.com