Where can I buy a good portable car humidifier?

I suffer from sinus problems and allergies and absolutely hate indoor forced air for what it does to my throat and nasal passages, yet love it for the immediate warmth. I tried using a car deodorant bottle that clips onto the vent by filling it with water, but it was ineffective (not enough humidity). Got any suggestions?
Answer 1 – good suggestion, but I’m not a whiz at creating a new outlet for an adapter on a gizmo that didn’t initially come with one. However, I have the good fortune to have an offer by a CSR at an auto parts counter who is concocting something.

Answer 2 – Good point. I’ve also thought of that and will have to purchase a defogger agent (like Rain-X) to wipe onto the windshield (inside) to prevent condensation build-up.

Can you advise me abt my allergies?

I have bad seasonal allergies and I also think its caused how my home heats up in winter, the heat doesnt blow into the bedroom directly. I have been waking up sick with allergies (sneezing, puffy eyes, itchy ears, very stuffed nose) for 2 weeks. I take singulair at night, clear out my nose in the morning, spray flonase, take a claritin for my itchy ears immediately, and if all fails I take a prescription decongestant Guaifenex (similar to mucinex). I cant be taking all these medications every day. sudafed helps but it makes me sleepy. Can someone suggest me if I need to ask my doctor abt allergy shots or humidifier or ionic breeze that would help with my home setting and my seasonal allergies. I dont know what to do? Does Zyrtec work? I hate to take shots because my budget is tight? If you think a humidifier/ionic breeze I want to know what type (kind) would be for a bedroom setting? I dont have food allergies and I keep a clean house so I dont know what to do.

does an air purifier work with allergies?

I have 2 kids with allergies!!,pollen. I have tried humidifiers but does not seem to work for them. I was wondering if an air purifier would help better. I just air-cleaned my house so it must be a really bad allergy season!! If you know any other tricks,please share it with me…thanks
Thank you all for your answers!! it has been really helpful…