Our medical oxygen concentrator bubble humidifier bottle comes in 250 and 500ml sizes for your convenience. This product is perfect for adding moisture to the oxygen supply, making it easier for patients to breathe. We are a factory that produces high-quality products to improve the health of individuals. Our bubble humidifier bottle is made from durable materials that are easy to clean and maintain. With this product, you can be sure that your patients will receive the best possible care. Our factory is dedicated to providing exceptional products at affordable prices, so you can rest assured that you're getting the best value for your money.