What to get my sister??

One of my sisters are not in my wedding party (her choice b.c of personal reasons) However, she will be doing a reading and is very involved in everything. I don't want to her to feel left out and want to get her a present to say Thanks for everything - any suggestions on what to get her.


TIA

A bottle of wine might be nice. Or a gift certificate for massage, day of beauty, etc...
One friend of mine who is doing a reading is a Coca-Cola fanatic and collects everything related. I got her a complete dining set of plates, cups and saucers.