Personally, I'm always fond of sort of nicer, more 'grown-up' stuff that can be used on a daily basis and show off your Theta affiliation. Something like an engraved keychain with the letters or crest, or maybe a little charm if she's a charm bracelet kind of person.
On the total opposite side of the spectrum, those lip balms and nail files are kind of cute in a really dorky kind of way
Hope that helps a little.
Greekgrrl
PS I personally can't stand most of the stuff with pansies on it because it either has all kinds of pansies (ours is really only the black & gold pansy) or it's really grandma-ish and looks like it belongs in a dusty parlor or a bathroom or something. But that's just me.