The straight Neil Med bottle can’t be boiled 10 minutes. I called and they said 5” max. They have started making a Squeezie nasal rinse bottle that can be boiled and I switched to it. I do prefer the original because it’s simpler confirm the volume to add the med to (the design makes it have air bubbles), but being able to clean is more important. If you’re just adding saline, that won’t be issue and some prefer the Squeezie. .
I found the squeezie at CVS once, but usually get from Amazon.

Be sure to say KAAA as you initiate rinse to keep fluid from ears.