Jennifer Aniston's Must Haves: From Viral Collagen Powder to a Microcurrent Device

Oura Ring ($249, originally $359)

Despite having a "love-hate relationship" with the wellness tool, Aniston considers this ring to be one of her most prized sleeping essentials. "I struggle with sleep, so it's something that allows me to really track how that's going. You can either start your day off feeling incredible or it will just tell you how crappy you did — like, first thing out of the gate, you get a 60 sleep score," says Aniston. Learn more about the wellness tool's full capabilities in our Oura Ring review.

Pro Tip: This compact ring is great for those who are looking to track their sleep, nighttime activity, stress, heart rate, and more, all through the accompanying Oura Membership.