I used a nuby cup first off, it's shaped like a spout but soft like a bottle teat (my DS2 would never take a traditional bottle). Alot of the age range on cups is a guide line only. You sound like you have a smart little cookie and could be worth giving the straw cups a go
Leave them about the house with water in them so she can get them herself and then try EBM once she seems interested enough.
The Avent sippy cups are pretty good as well, if she flukes some milk out of it, she may want to keep going.