Most people have some sort of emergency kit they keep in the car. If you're traveling in the winter, you should always bring along basic things like blankets, snacks, and water. Most people wouldn't think to keep diapers in their emergency car kit, but if you have a child in diapers it's critical to keep a few extra diapers on hand.
- Package of disposable wipes (or a water bottle and cloth wipes)
- Three cloth diapers (preferably without PUL lining that can be damaged if left in a hot car for extended periods of time) or disposable diapers.
You might end up using your emergency diapers more often than you would expect. Let's say you bring your child to and from daycare every day. You load your child into the car and start heading for home at the end of the day. It's a short car ride so you don't normally expect to change your child during the trip and you don't normally bring along a diaper bag. However, traffic is bad and your child poops on the way home. You can stop and change your child.
In another scenario, you're on an outing with your family and you have a change in plans. You're going to be away from home longer than expected and you're running low on diapers. You can grab some diapers from the emergency kit and be on your way again.