The Elder Scrolls Online official site has posted an announcement that Crown Crates are to be added to the buy ESO Gold Store On December 1st. Thus you are available with a chance to to obtain exclusive and unique pets, mounts, and more alongside useful consumable items.

ESO Gold Crates

The first season of Crown Crates is to be added. The following is an announcement.

"Crown Crates are purchased through the Crown Store, and contain a randomized selection of useful consumables and collectibles that are valued more than the price of a single crate. In addition, they also offer a chance to obtain unique cosmetic items, pets, or mounts. Crown Crates include new and exclusive items, as well as some items you might have missed in previous limited time offers.

Whenever you purchase a Crown Crate, you will always be awarded four items, with the chance to get a fifth item. In the event you receive a mount, pet, costume or personality that you already own from your Crown Crate, you'll be awarded a new resource - Crown Gems - in its place. You will also have the option to convert several items obtained from Crown Crates to Crown Gems any time you want. Items that can be manually converted include potions, poisons, riding lessons, experience scrolls, and other utility-type items TESO Gold.