gosh my sinus really hurts on one side

[Mister Obvious]

Just snort some warm water. Fresh from the tap into your cupped hands. Any vessel you use can harbor germs.

Yeah that is a really important point...

I always throw away those bulb shaped squirter thingies after the first few uses for that reason.

Kind of not an economical approach to things at all, so the cupped palms approach is probably the better idea.

Or you could use a regular bowl and a new straw. I think that's a decent solution too.