Getting perfectly curled hair can be a real pain in the butt (and wrists), but there's a viral hack going around TikTok that promises easy curls using just a water bottle and a hair dryer.

It looks pretty simple. Just take a water bottle with the top cut off and a slit in the side, insert your hair, and blow-dry with a concentrated nozzle attachment. Voilà — instant curls.
Here's a full demonstration.
View this video on YouTube
The results on the videos I saw were pretty impressive, considering how easy the hack is.
Naturally, I had to try it for myself.

I started with an empty water bottle and cut off the top. I also cut a rectangular hole in the side to fit my hair dryer nozzle.

Since my hair is naturally curly, I recruited my girlfriend to be the hair model.

She was thrilled!
The first results were...curlyish? But mostly just a messy swirl.

The bottle also gets really hot from the hair dryer, so definitely proceed with caution if you try this for yourself.
I tried again on the other side and, again, the results were less than desirable.
I consulted TikTok again. On this video, where the hack didn't work, people left comments saying the hair should be wet.
Of course!
So I tried that.

And while it definitely did make a stronger curl, it also fell out the second I touched it.
And if you're wondering, I let the hair dryer go until the bottle was too hot in my hand to hold anymore. I tried! I really did!
I'm not the only one who failed at this. There are almost as many failed attempts as successful ones in the videos I saw on TikTok.
Overall, I'd give this hack a 3/10 — mildly successful, but mostly a waste of time.
If you give it a try, let us know how it goes in the comments!