Minimalist/ green registry

Hi, everyone!

My sister and friend want to throw me a baby shower so I've been trying to decide what to put in the registry. This will be baby #2 for us and for what I remember, we had way too much stuff with baby #1 (many things she didn't get to use or outgrew too quickly). So my question is, what is a must in your registry? I'd like to keep it "green" if possible (e.g. cloth diapers instead of disposable ones).

Thanks!!