Supporters of the trick claim that this extra movement can:
- Help prevent clothes from becoming tightly tangled
- Encourage better movement of laundry inside the drum
- Help bulky items separate during washing
- Potentially improve the circulation of water and detergent
The bottle isn’t actually cleaning the clothes by itself. Its proposed benefit comes from the physical movement it adds to the load.
Why Do People Find the Trick Useful?
Large items can sometimes form a heavy bundle inside a washing machine.
When that happens, the machine may have more difficulty distributing the load evenly. Clothes can also end up tightly wrapped around one another.
A lightweight object moving through the load may help disturb that bundle.
However, how effective this is depends heavily on the washing machine, the type of laundry, and the size and shape of the bottle.
It’s best viewed as a household experiment rather than a scientifically established
