Is that sterile?
I had some similar to that once for my dogs, believe it or not. They had terrible nasal allergies one year and the pediatric squirt bottle helped them a lot. I didn’t use it on myself. They didn’t like it much but it worked.
The main thing is....make sure it’s sterile. Too many paths to the brain from the sinuses and don’t force it. Let it flow. My Neti-Pot is gravity fed so it goes in one side and flows out the other side without pressure.
The same thing happens with people that jump in dirty pond or lake water and the water is forced up their nose. It’s rare but it happens. The brain eating bacteria/amoeba is deadly when it happens.
When done right, all sinus cleanses help. They can be dangerous though.