You step out your front door, keys jingling in hand, and there it is: a plain plastic bottle, inconspicuously placed at your doorstep. Odd? You bet. Harmless? Think again. This simple object could be a burglar’s not-so-secret signal that your home is in their sights.
Burglaries on the Rise: Know the Advance Signs
The number of burglaries in France has been steadily climbing for several years. It’s enough to make anyone double-check the lock—even on the biscuit jar. To prevent break-ins, it’s more important than ever to spot the warning signs. Burglars use a variety of clever techniques to secretly communicate with each other before making a move. Among their favorite tricks? Leaving coded messages right outside the homes they’re considering for their next visit.
Undercover Recon: Burglars in Disguise
Before most burglary attempts, there’s a little recon mission. And no, it doesn’t involve spies in trench coats—though you might wish it did. Instead, ill-intentioned individuals might show up at your house posing as professionals you think you can trust:
- Fake police officers
- Imitation postmen
- Phony chimney sweeps
- Pretend garbage collectors
Their goal? To scope out valuables and gather information about who lives in the home. Remember: that overly chatty stranger at your door may have more than good manners in mind.
The Coded Language of Burglars: From Bottles to Biscuits
After casing your place, these would-be burglars may leave behind a series of coded markers—typically at eye level by your front door, or even on a nearby wall. Here’s where things take a twist. The latest trick in their repertoire is dropping a water bottle in front of your entrance. This bottle isn’t just litter; it’s a communication tool. It tells burglars whether the coast is clear, allowing them to determine if anyone’s home.
Here’s how the system works:
- If the bottle stays put, it signals that you haven’t returned and the way is clear.
- If the bottle disappears, it means someone’s home—and it’s time to abort mission.
Burglars will then bide their time and wait for you to leave again before making their move. The system is simple, subtle, and deceptively effective.
But the bottle is just the tip of the iceberg. Other coded signs include:
- Chalk marks—triangles, crosses, circles—drawn on a wall or tree nearby
- Stickers placed discreetly near your home
- Biscuits (yes, you read that right) slipped under your doormat, to check if you’ve stepped on them and thus if you’ve come home
So, if you spot odd geometric graffiti or find a random digestive underfoot, don’t just brush it off—investigate!
Turning the Tables: Outsmarting the Bottle Test, Boosting Security
Is there a way to counter this sneaky strategy? Absolutely! Here’s a neat trick from Maison & Travaux:
- Place a glass or a bottle of water just inside your front door.
- If you find it knocked over on returning home, it’s a sign someone’s tried to break in or scouted your entrance a little too closely.
This simple move gives you a heads up, so you can ramp up your vigilance and bolster your security if needed.
Of course, water bottles and biscuits aside, nothing beats real protection. The most effective way to dissuade burglars is to reinforce your entry door. Consider installing a security system, too—but check that your alarm kit covers every strategic part of your home. And don’t forget a loud siren: nothing scares off a would-be intruder (or wakes up the neighbors) quite like an unexpected blaring alarm.
Conclusion: Stay One Step Ahead
When it comes to home security, a little awareness goes a long way. Knowing the signs—yes, even those left in bottled form—empowers you to act fast and keep your sanctuary safe. So, the next time you spot something odd at your door, don’t just shrug it off. Stay alert, review your security measures, and remember: sometimes, it’s the smallest gestures that keep the worst dangers at bay.

Based in New York, Josh is the creative mind behind Lanco Handmade Furniture.
Passionate about timeless design and fine craftsmanship, he transforms high-quality materials into pieces that are both functional and artful.
With a keen eye for detail and a love for natural textures, Josh creates furniture meant to bring warmth, character, and lasting beauty to any space.




