DampRid Fresh Scent Refillable Moisture Absorber - 10.5oz cups - 2 pack – Traps Moisture for Fresher, Cleaner Air

Can I put this in my car? Will it tip over? (It rained in my car and now it's wet in there)

Do you think this will work for pet odors in a closet? We think the previous owners had litter boxes in a closet and now they smell like cat pee.

Can I use this inside an out-of-use refrigerator being stored with the door closed?

Is it easy to tell when it needs to be replaced?