It’s an odd bit of advice to hear the first time. You walk into a hotel room, drop your bag, and someone suggests you throw a plastic bottle under the bed.
The tip comes from a flight attendant, and it has been repeated across travel and lifestyle sites since it went viral in 2024. It’s simple, it costs nothing, and the reasoning behind it says a lot about how people who live out of hotels think about safety.
The Trick in Plain Terms
Flight attendant Esther Sturrus shared a trick that involves a single water bottle.[1] She is a KLM flight attendant who posted her travel safety tips on TikTok.[1]
Her advice is to throw the bottle under the bed. If it rolls out the other side, you’re safe.[1] It lets you check the space without getting down on your knees to look.
Where the Idea Came From
The same tip was covered by Tyla, which credited a flight attendant named Nassim. According to the report, her habit comes from a fellow flight attendant who was attacked in a hotel room by someone hiding in the wardrobe, after she did not check the room properly.[2]
That context matters. The bottle isn’t a gimmick for its own sake. It’s one small step in a routine built around an incident that crew members say really happened.
Why Flight Attendants Think About Hotels So Much
For most travelers, a hotel is an occasional stop. For crew, it’s closer to a second workplace. Veteran flight attendant James Wysong has written that most crew members stay in at least one hotel every time they go to work.[3]
He also noted that crews might check in at 2 a.m. and check out at 10 p.m.[4] Arriving at odd hours, often alone and tired, is the kind of situation that makes quick, repeatable habits worth having.
What the Bottle Can and Can’t Tell You
The logic is straightforward. If the bottle rolls out the other side of the bed, nothing is blocking its path.[2] If it stops partway, something is in the way.
Still, it only tests one stretch of floor. It says nothing about the closet, the bathroom, or behind the curtains. Think of it as one quick check, and not a guarantee about the whole room.
The Rest of the Room Check
Other flight attendants describe a broader sweep. Kat Kamalani, whose hotel tips video drew more than 4 million views, advises checking whether anyone is in the room, behind curtains, or under the bed.[5] She also recommends making sure no one is behind you as you enter.
Once inside, she reminds viewers to lock both the main lock and the top lock on the door.[5] Small steps like these take less than a minute in total.
Luggage, Napkins, and Door Tricks
Nassim’s routine includes a way to keep the door from closing while she looks around. She uses her luggage case to hold the hotel door open.[2] That way, she has a clear exit while she checks the room.
Another flight attendant, Simpson, goes further when she’s in an area she considers risky. Her routine includes plugging the peephole with a napkin and placing a remote control on the door handle as a makeshift alarm.[6] These are personal habits, not official safety rules, so use whichever ones feel sensible to you.
Choosing the Hotel Before You Arrive
Some of the best protection happens before you ever reach the room. The advice is to read reviews, look at photos, study what the area looks like, and plan how you’ll get to the hotel.[6]
One commenter on Simpson’s video offered a rule of thumb that the article repeated. They avoid hotels where the room can be reached directly from a parking lot or the street. The article’s author agrees, unless it’s a resort or the room has an outdoor feature like a balcony, preferring to walk through the hotel to reach their room.[6]
Checking the Bed Itself
While you’re down near the bed, it’s worth a look at the mattress too. One flight attendant, Hannah, starts with a visual inspection of the bed’s corners, looking for signs of bed bugs.[7]
The risk isn’t trivial. One report, citing Forbes, puts the chance of encountering a bed bug in a hotel at about one in seven.[7] Bed bugs can damage property and require costly pest control.[7]
Small Habits That Round Out the Routine
Kamalani suggests a few hygiene habits as well. She says to remove the top pillows or comforters from the bed, claiming hotels never wash them.[5] She also advises never putting your bag on the bed.[5]
Wysong adds a comfort tip that suits the water bottle theme. Keep a glass, or better yet a bottle, of water within hand’s reach.[3] The bottle you toss under the bed can be the same one you drink from.
What to Take Away
The water bottle trick is a quick, low effort way to test the floor space under a hotel bed. It comes from a KLM flight attendant’s TikTok advice and is rooted in a colleague’s reported attack.
It works best as part of a wider routine: check the room, lock the door fully, choose your hotel carefully, and inspect the bed.
