I keep the hand sanitizer in my purse. I heard that since it is flammable, not a good idea to keep it in your car. Also, I keep my main mask in my car - triple layer fabric, homemade. I have another in my purse that I bought at Walgreens as a back up. Maybe have a couple of extra masks in your car so they're there when your DH forgets his @karenerwin. Just a thought.