Overview & background
Toners and essences are watery liquids applied a little at a time — usually splashed onto a cotton pad or the palms — so their bottle needs to release product in a controlled trickle rather than a gush. A reducer or sprinkler plug fitted into the neck does this, metering the flow so the user shakes out just a splash.
The slim, tall silhouette suits the multi-step layering routines of Korean and Japanese skincare, where a toner sits among several elegant bottles on the shelf.
