Family Gift Bundles are special purchasable bundles that will grant additional items randomly to other family members who claim them. There is a pool of items available to be claimed, and when another family member presses “Claim” in the Family Chat, they will be given a random single reward from that list.

Just so you know, to purchase Family Gift Bundles or receive items from them, you must be on version 6.12.0 or more significant.