potty training advice needed please

[Presh78]

I would be really grateful for some advice/tips. My daughter who is 2 and a half is clean at home, she uses the potty on her own With no problems. The problem is when we are out as she will wet herself. I take the potty with me and sit her on it at regular intervals, ask her every 10 minutes or so if she needs to use it etc and she will sit on it but won't use it. She will stand up and wet herself. She knows what she has to do but it is like she is embarrassed. I don't know how to overcome her eembarrassment. I don't want to get into the habit of using a pull up when out. Im really unsure how to tackle this one. I don't want to make her anxious but I also don't want to get into bad habits.
Any tips would be grately welcomed ??

[Piratejones]

pullups & training pants are a great tool for this situation.