But how do you get the parent to bring the child in underwear? If they aren't comfortable letting the child ride in the car in just underwear then they are likely bringing the child in a pullup so caregiver is stuck with just pullups. I have one that could probably go into underwear except naptime but he is content in a pulllup, uses the toilet and hasn't had an accident here in over a month but he still wets in the evenings and when he sits to watch tv such as a movie or on weekends at home so he is just being lazy. Here I think the normal routine helps him go because he must try potty before certain events like sitting for lunch.