DD's been using her little potty for two weeks now with no accidents (during the day). However, she's still terrified if I try to put her on the big potty, so when we go out she's back in diapers.

Any tips for helping her transition to the big potty so that she can still use it when we go out? How did you handle this? It really bugs her to go in her diaper now so she tries to hold it the entire time we're out until we get home and she pees a ton. I know that can't be good for her.