If you're a makeup lover who enjoys customizing your lip products, the TKB Lip Liquid is a game-changer. This tiny but mighty product lets you transform any lip balm, gloss, or stick into a vibrant, long-lasting stain with just a few drops.

The magic happens when you apply it—what looks like one color in the bottle blooms into a completely different shade on your lips. I tested it by mixing a drop into my favorite clear lip balm, and voilà! A gorgeous rosy pink stain that lasted for hours without smudging or transferring.

One thing to note: this stuff is POTENT. My first try ended with Barbie-level pink lips (and fingers—oops!). A little truly goes a long way—start with half a drop and build up. The color stays put even after the balm wears off, so no constant reapplication needed.

While most users get that signature hot pink result, I noticed the final shade varies slightly depending on your natural lip color. It’s perfect for creating custom shades—I even experimented by adding green mica to neutralize the pink base for a more berry tone.

The only downside? If you’re not into pink, your options are limited. But for $15 and enough product to last years (seriously, 5 drops colored 30 glosses!), this is a steal for DIY beauty enthusiasts.

Pro tip: Use gloves when mixing unless you want tie-dye hands for a day. And forget buying expensive color-changing glosses—this bottle lets you create dozens!