Flowers or potted plant or wine or chocolates or a little kit of coffee…
All are stuff that don't have to be consumed that day, or are non-consumable. All are things that are not permanent (i.e., next time you go over there if you don't see the plant or the chocolates you brought, you won't be upset or even think twice. But if you bring a table trinket, she'll be secretly annoyed because it is something she can't get rid of or may feel she has to display, and it's almost never what someone wants.
A lot of this works for holiday presents as well, btw. Last Christmas my DB gave my DH a huge painting (horrible) and I almost had a heart attack. Fortunately the painting went to DH's office