Some people claim that placing one or two clean, sealed plastic bottles inside a washing machine can help reduce wrinkles and improve the movement of laundry. The bottles may create extra movement during the wash cycle, helping bulky items like sheets and large pieces of clothing move more freely instead of twisting together.

The idea is that the bottles may help prevent clothes from tangling while allowing water and detergent to circulate more effectively. However, **there is no strong scientific evidence that this trick consistently improves washing results**, and its effectiveness may depend on the washing machine, the amount of laundry, and the type of fabric.

Before trying this method, it is important to consider safety. Only use bottles that are clean, sealed, and undamaged, and avoid overloading the machine. Plastic bottles may not be suitable for every washer, so checking the manufacturer’s instructions is a sensible precaution.

For more reliable results, consider using your washing machine’s built-in settings for bulky items, choosing the correct spin speed, and avoiding excessive loads. Dryer balls may also help separate fabrics and reduce tangling when used in a compatible tumble dryer.

Although the plastic bottle trick may sound simple, **it is not a guaranteed way to prevent wrinkles or improve laundry movement**. Following your machine’s instructions and choosing the right washing settings remain the best ways to care for your clothes.