There's a new Shirakami voice line set on sale. I guess this "starter" product line is to ensure that there are always some sort of goods available for each member even outside of special time limited events. Similar basic acrylic stands and key chains have been available for a while. The price is pretty reasonable, I'll definitely pick it up.
https://shop.hololivepro.com/products/startingvoice_shirakamifubuki