How can I safely store cooking oil in plastic bottles to ensure its quality and freshness?

To safely store cooking oil in plastic bottles and maintain its quality and freshness, make sure the bottles are made of food-grade plastic. Store the bottles in a cool, dark place away from direct sunlight and heat sources. Keep the bottles tightly sealed to prevent air and light exposure, which can cause the oil to spoil. Check the expiration date on the bottle and use the oil before it expires for the best quality.