Using these bottles is super easy. Just open the bottle, pour in your favorite perfume or cosmetics, and close it up. When using, make sure to keep the bottle upright to prevent any leakage. To keep it in good shape, clean it regularly with mild soap and water. Avoid using harsh chemicals as they may damage the glass. Also, store it in a cool, dry place away from direct sunlight. This will help preserve the quality of your perfume or cosmetics and keep the bottle looking great for a long time.