It's actually a brilliant invention. By combining two colors into one lipstick you can more easily get the gradient look just by applying and then blending.
I had been trying to get my hands on the Laneige Two Tone Lip Bar but for a while they were so popular the good colors were sold out almost everywhere in Seoul!
Luckily, I got to try another version which is Secret Key's Sweet Glam Two Tone Glow. It's the same concept although the secondary color is actually more of a sheer gloss rather than a more pigmented color.
Sweet Glam Two Tone Glow Color Options:
There are three colors though I only have two shown above.
The colors are: 1) Chic Red (shown) 2) Lollipop Pink (shown) 3) Juicy Orange (not shown).
As you can see in the photo of the color swatches above, the lipsticks have two shades - a darker, more pigmented color and a secondary lighter color that's actually more of a gloss. When applied the pigmented color pops much more and the sheer gloss is pretty transparent.
When applied to the lips it does help create the ombre gradient look. I like the clear gloss as the secondary color because it makes the color blend more naturally rather than having two very different colors. It also is moisturizing and gives the lips a nice glow and shine.
The colors are great and multi-purpose for creating lips as a main focal point (or what Koreans call creating a "point"). I've been wearing them every day these days and really like the dimension they create with the two tones.