Hey guys and girls, I'm gonna be an auntie in August!

I'm really excited. I'm attending my sister-in-law's baby shower in June and have already gotten a few gifts such as onesies and socks. I want to get my sister-in-law some diapers but I'm having a tough time deciding what to get for her. I'm don't care if it's green or not. I just want to get her something she'll love. Do you guys have any brands that are good, especially in the absorbency and cleanliness department?