What supplies shouldn't be stored in your car because of their sensitivity to below freezing temps?

I want to know what I shouldn't store in my car during winter months. Are any common items damaged by by low temps?

First Aid items?

Toiletries?

Pressurized fuel cans?

Batteries? (li-ion, Ni-Cad, Ni-mh, alkaline, etc)

Also I know my sawyer filter is damaged if frozen, what is another small, simple and cheap filter that I could keep in my car and wouldn't get damaged by freezing?