already specifically designed to tumble and agitate clothing, so there is no strong reason to assume that adding a bottle will dramatically improve cleaning performance.
Why Has the Trick Become Popular?
Household hacks often become popular because they’re inexpensive and easy to try.
Instead of purchasing another laundry product, you simply reuse something that would otherwise be thrown away.
The visual aspect also makes the trick perfect for social media: a completely ordinary object is placed somewhere unexpected, and people naturally want to know why.
But a viral trick isn’t necessarily a scientifically proven one.
Could It Help With Lint or Pet Hair?
Some versions of this hack claim that the bottle can help collect loose fibers or pet hair during washing.
There may be some movement-related effects depending on the load and washing machine, but results are likely to vary considerably.
If pet hair is a major problem, more
