Well, the first one looks like the right kind of syringe, but it has the black rubber tip on the end of the plunger. You probably would want to avoid that. It holds water after you wash or rinse it, even if you take it apart. I don't know about sinuses, but I have handfed plenty of baby parrots and didn't like to risk bacteria or worse being left behind to be introduced at another feeding...

I could not get two of the sites to open and the other one was a bulb syringe-don't know if that one will work or not.

I will look and see if I can find the kind I was talking about.

Cathie