You can go to a local drugstore or a store that specializes in selling medical equipment to see if the manual simple nasal irrigation device is on sale. Neti washers, both manual and electric, are generally sold online. Be more careful when buying online. When buying, you can pay more attention to whether the company has a formal business license, formal medical device licensing qualifications, and whether it has its own factory. Look more at the actual experience of online purchasers, and pay attention to buying the nasal irrigation products with the largest sales volume and the best reputation. After all, the experience of others is the most worth learning from. Hope my suggestions are helpful to you.