Good in theory
I loved the idea about the eco piggy not having a filter, so there would be nothing to throw in landfill. While it does work at clearing your little ones nose, and the mucous will stay in the device. You will end up drawing lots of particles into your mouth, and you can taste it, as well as get sick from it. Which has happened at our house every single time. Again, I really like the eco friendly nature of this product, but you will run the risk of getting sick and end up with the taste of mucous in your mouth, I recommend saving your money, and the risk of sending this product to landfill after a few uses, and getting a product with a changeable filter like the nose-frieda.