After joining any club, you can purchase a Club Chest. This is a special chest that gives you lots of useful items and also benefits your club, as each of its members will receive the same items as you—just in smaller quantities.

How to buy the chest?
Click the CLUBS button on the left side of the main screen to open the clubs panel and go to the CHEST tab. There you can make the purchase and see exactly what you and the other members of your club will receive.
If you don’t see this tab, it most likely means that you’re not part of any club.

Note: Each club member must collect their share of the reward. If someone doesn’t claim it, it will be lost.