Like diet cherry cola without the guilt — subtle spice, classic cola bite, maraschino finish, and the perfect level of sweetness.
130mg
Caffeine
200mg
L-theanine
0g
Sugar and 5 calories
No
Artificial sweeteners, flavors, or colors
Taste
Classic cola character with a cherry finish. Nostalgic, lightly spiced, smooth, and perfectly sweet.
Why it's different
Cherry Cola gives you the flavor you want from soda, without the syrupy feel or artificial overload.
Best for
Midday slumps, work sessions, pre-gym motivation, and anyone who wants a more interesting energy flavor.
Just Clean Ingredients
Every ingredient in O2 is chosen for function so it’s backed by science, not marketing shortcuts.
Carbonated Water
A clean, refreshing base that gives O2 Energy its crisp finish.
Erythritol
A naturally occurring sugar alternative that maintains a smooth, easy-drinking finish.
Sodium Citrate
One of the core electrolytes in O2’s formula. Sodium helps your body retain fluids and supports hydration.
Monopotassium Phosphate
A key electrolyte that works alongside sodium to support hydration and fluid balance.
Phosphoric Acid
Adds the classic cola bite that gives this flavor its soda-inspired edge.
Citric Acid
Adds brightness and helps keep the finish crisp and refreshing.
L-Theanine
Paired with caffeine for a smoother, more balanced energy experience.
Natural Caffeine from Green Coffee Beans
Provides clean, steady energy from a natural source.
Stevia Extract (Rebaudioside A)
A plant-based sweetener that adds sweetness without artificial sweeteners.
Natural Flavors
Create the cola, cherry, and subtle spice notes.
Monk Fruit Extract
A premium fruit-based sweetener that helps round out the flavor and keep sweetness balanced.
Customer Reviews
Overall rating: 4.8 / 5 from 510 reviews.
I'll be 90 years old in a few months. I truly enjoy a healthy alternative to regular water after a Legends Class workout. Not only is the O2 Water hydrating, it is also very tasty. Love these products.
Sarah S.5/5Verified
So smooth, I can drink this everyday.
Francisco E.5/5Verified
Such a good go to for mid day hydration!
Justin B.5/5Verified
Always a treat! My midday go to. My wife started drinking my supply and loves them as well! Light, refreshing, oxygenated water - YUM!
Erik L.5/5Verified
The taste is 10/10!
Natalie B.5/5Verified
Great product that I enjoy sharing with friends and family. I drink them before or after workouts to stay hydrated.
Sarah S.5/5Verified
All of the flavors in the variety pack are great! I love the crisp, clean taste and all the electrolyte goodness in each can!
Melissa B.5/5Verified
My new favorite healthy drink! Thinking of doing a subscription on my next order.
Lawrence R.5/5Verified
Bring back non carbonated orange mango
Joe K.1/5Verified
Got my girlfriend hooked on O2 as well!!
Luke A.5/5Verified
My favorite drink. For work I have to suit up in protective clothing. I make sure to drink one of these every single morning before I do anything. I spent all day sweating off and on. And then I go home at the end of the day and I work out and this really helps me stay hydrated. I’m so glad that they brought this back. I missed it so much! I will give it 10 stars if I could
Amanda W.5/5Verified
Great product! I’d love to see more options for the caffeinated drink, this product has helped me kick my Red Bull habit. I feel much better added this to my routine
Jessica H.5/5Verified
Has good flavor, but I am personally not a fan of the carbonation and decrease in electrolytes with the new formula.
Arlen F.4/5Verified
I discovered O2 at my former CrossFit gym, and I’ve kept it as part of my fitness regimen. I feel good about putting O2 in my body after workouts
James W.5/5Verified
Love the variety pack. I see it isn't offered any longer as O2 no longer produces the grapefruit/ginger. That is a huge bummer, despite the recent change in taste. Wish you would bring it back.
Cynthia L.5/5Verified
I’m obsessed with 02 Hydration. I get excited for my order because every flavor is bursting with taste. Honestly, you can’t go wrong — I recommend trying every single one.
Patrick S.5/5Verified
My favorite they're so good the black current and the lime. the best hydration drink in the world!
Enmanuel V.5/5Verified
Very good thirst quencher and I love the Strawberry Lemonade.
Felecia W.5/5Verified
Love all the flavors in the variety pack, and the ability to grab caffeinated or uncaffeinated depending on my need.
Nate E.5/5Verified
Love O2 beverages. Have been drinking them more in place of diet pop drinks.
Jay R.5/5Verified
As always, O2 mixed pack delivers! Love all 4 flavors and look forward to having an ice cold can as soon as I’m back from my workout!!!
Katie C.5/5Verified
Great tasting product, love the lack of carbonation, and delivery notifications are spot on
Michaela Y.5/5Verified
Always taste! A favorite alternative to H2O when staying hydrated!
Erik L.5/5Verified
Hydration 100%!! Without the burn or bubbles. Great product!
Shanon R.5/5Verified
It arrived on time, I like the variety & they are tasty.
Denena S.4/5Verified
I enjoy a change in flavor and not the quality. Great taste and hydrating.
Sarah S.5/5Verified
Love it
Lawrence R.5/5Verified
My husband and I love the old formula! Please restore the flat grapefruit/ginger and orange/mango.
Cynthia L.5/5Verified
not the same as the orange mango
Conrad B.3/5Verified
great drink, great flavors!!
Katherine H.5/5Verified
Great taste and awesome post workout hydration!
Danielle J.5/5Verified
O2 is a wonderful product that is a must have after workouts and or walks❤️
Shanon R.5/5Verified
I love O2! Years ago they shared their story in a class of mine at tOSU and ever since I always buy them. They have fueled me and my bike team at our Bike MS events for years now and are always a hit. The new flavors are a great add on!
Zack B.5/5Verified
So refreshing. Great during exercise and during the day
Brian S.5/5Verified
I have subscribed for several years.
Great product!!!
Elaine W.5/5Verified
My husband and son-in-law love the cherry cola drink, but I’ve been a fan of the others for years now. I thank my trainer for introducing me to your product! Thank you!
Letty M.5/5Verified
Tastes good
Samantha R.5/5Verified
Delicious and refreshing!
Janine M.5/5Verified
Looooove O2- it tastes like the purest water with a delicious flavor, and it is amazing post-workout or anytime!
