I only have one, so there are no hand-me-downs (but boy I'd sure love some!)
The best thing someone did for me was make casseroles to freeze. I really really appreciated it. Medela makes these steam bags that you can put bottles and breast pump items in and place them in the microwave for a bit and then the items are sanitized. It was SO great for traveling (especially for the holidays!) when I just didn't have the place or time to clean bottles. Those were wonderful to have.
Oh, and Happy Birthday x 2!