Voking Digital via Amazon is discounting the Meike MK-EOSRG Hand Grip for Canon EOS R for $31.99, a 20% prime day discount from the regular price of $40.
This metal grip has an Arca-type compatible base, which attaches to the bottom of your camera via the threaded camera mount. In addition to making it easier to hold your camera, it can be used as a tripod quick release plate.