An unusual laundry hack has been gaining attention online: putting one or two clean, empty plastic bottles with tightly secured caps into the washing machine with your clothes. The idea is that as the bottles move around inside the drum, they create extra movement between the fabrics, which may help clothes wash more evenly and reduce wrinkles. However, this is a household trick rather than a scientifically proven laundry method.

Supporters say the moving bottles can reduce tangling, especially with large items such as bed sheets, hoodies, jackets, and comforters. The extra movement may help water and detergent circulate through the load more evenly while preventing clothes from becoming tightly bunched together. Some people also believe the bottles can help bulky items stay more separated during the wash, potentially improving how evenly they are cleaned.

The results can vary depending on the washing machine, load size, fabric type, and selected cycle. Some people may notice a difference, while others may see little or no improvement. The trick is mainly intended as a simple experiment using something that would otherwise be thrown away.

If you try the hack, use only clean, sturdy bottles that are completely empty and have tightly screwed caps. Avoid damaged or fragile bottles, and do not overload the washing machine. If the bottles cause excessive banging or unusual movement, stop the cycle and remove them. It is also important to follow the washing machine manufacturer’s instructions.

For people who want to reduce tangling and improve airflow, many modern washing machines already include features designed for this purpose. During drying, specially designed dryer balls can also help separate fabrics and improve airflow without relying on ordinary plastic bottles.