Every soapmaker knows the customer who buys a beautiful bar, takes it home, and puts it in a drawer "for guests." Three years later it's still in the drawer, slightly faded, waiting for a guest good enough. The lavender soap theory is, more or less, a gentle intervention for that person. And honestly, we're for it.
What is the lavender soap theory?
It's the idea that you should use your nice things now instead of saving them for a special occasion that may never come. Wear the good sweater. Light the good candle. Use the good soap. And when someone you love wants to share it, let them.
It took off on TikTok in December 2025, with people posting about finally wearing the outfit they'd been saving and letting their partners use the expensive shampoo. One creator summed it up as "clothes are meant to be lived in," which is about as good a motto as any.
Where does it come from?
BookTok, the book-loving corner of TikTok. The name comes from a scene in Sarah J. Maas's The Assassin's Blade, a prequel in her Throne of Glass series. Without giving too much away (light spoiler ahead), the heroine refuses to let someone she loves use her precious lavender soap, and the story later makes her wish very much that she had. Readers took the lesson and ran with it.
So the theory isn't really about lavender, or even about soap. Lavender just happens to be the detail that stuck.
Why it resonates
Most of us were raised by someone who kept the good dishes in a cabinet and the plastic on the sofa. There's a kind of thrift in that, and a kind of sadness too. The lavender soap theory is a nudge in the other direction. Nice things are meant to be used, small luxuries are meant to be enjoyed on an ordinary Tuesday, and the people around you are worth sharing them with.
It also helps that soap, specifically, doesn't keep forever. A handmade bar is best within about a year, and the scent fades long before the soap does. Saving it for a special occasion mostly means saving it until it smells like nothing. (We wrote about whether soap expires if you want the details.)
How to practice it with soap
- Take the nice bar out of the drawer and put it in the shower. Today.
- Keep a good bar at the kitchen sink, not just in the guest bath.
- Let whoever you live with use it. That's the whole point.
- Give it a dish that drains, so the good bar lasts as long as possible. A few tricks for that are in how long a bar of soap lasts.
Do we make a lavender soap?
Our closest is Buzzed Bee, which drifts through bergamot, lavender, oak moss and sandalwood. But you don't need lavender to follow the theory. Any bar you've been saving counts, ours or anyone else's. If you need a fresh one to start with, the whole soap shelf is here, and every bar on it was made to be used.