C4 Performance Energy Drink Cosmic Rainbow, Zero Sugar Carbonated Preworkout Energy, 200mg Caffeine with Beta Alanine, 16 Fl Oz (12 Pack), Packaging May Vary

This is my favorite energy drink ever. The flavor is amazing. It tastes sweet & fruity. It is very low in calories (10 calories per can), but does not taste like artificial sweeteners. It has a pleasant sweetness. 200 mg of caffeine per can. Gives me a nice afternoon boost. Caution* may cause an all over itchy sensation the first few times you drink this. Does not make me jittery. Best served ice cold.

I love this energy drink. After freezing it for one hour, you can feel the special taste of it. And I never thought the price in Amazon was so lower, it is a good choice to buy it. After I drink it, I can feel the energy in my body.

If you're on the lookout for a delicious energy boost, C4's Cosmic Rainbow flavor is definitely worth a try! This zero sugar drink manages to hit the sweet spot without being overly sweet, making it perfect for those who want a tasty pick-me-up without all the sugar guilt. You'd never guess it’s sugar-free! The flavor is a delightful medley of fruity goodness, reminiscent of a fun summer day. Each sip is like a carnival for your taste buds, with a vibrant blend that really showcases all the fruity flavors. It's playful and refreshing, making it a joy to drink whether you’re gearing up for a workout or just need a little extra energy to power through your day. What I love about Cosmic Rainbow is that it’s not just for gym-goers; it’s great anytime you need a burst of energy. The balance of flavors keeps things exciting, and it's definitely a drink you’ll want to keep on hand for those moments when you need an extra kick. Alongside its delicious flavor, C4 Cosmic Rainbow also packs a punch with its impressive ingredient lineup. This energy drink is formulated with key components designed to boost your performance and energy levels without the crash that often comes with sugary alternatives. One of the standout ingredients is **Beta-Alanine**, known for enhancing endurance and reducing fatigue during workouts. Plus, there’s **Caffeine Anhydrous**, providing that much-needed energy boost to help power through your day or gym session. C4 also includes **Citrulline Malate**, which may help improve blood flow and enhance performance, making it a great choice for pre-workout fuel. On top of that, it's fortified with vitamins like B3, B6, and B12, contributing to overall energy metabolism and keeping you feeling vibrant. What’s even better is that all of this comes without sugar, artificial colors, or preservatives often found in energy drinks. So, you can enjoy the fun and fruity taste of Cosmic Rainbow while fueling your body with quality ingredients. It’s the perfect blend of fun flavor and functional energy—ideal for anyone looking to boost their day in a tasty way!

Great taste. Not as good as when it was skittles taste but still kind of taste like water down skittles now. Does great at supplying energy. One of the better c4 flavors.

Why did you pick this product vs others?: I’ve been using C4 Pre-Workout, and it’s become a staple in my fitness routine. Whether I’m doing weight training or cardio, it gives me a noticeable boost in energy, focus, and endurance — without feeling jittery or getting a crash afterward. The flavor I tried (Fruit Punch) tastes surprisingly good — not too sweet or artificial, and it mixes well with water. I usually take it about 20–30 minutes before my workout, and by the time I hit the gym, I feel ready to push harder. The beta-alanine tingles are real, especially if you’re new to pre-workouts, but they wear off quickly and don’t bother me. I also appreciate that it doesn’t overload you with caffeine like some other products do — it’s a clean, focused energy that helps with performance without making you feel wired. Whether you’re just starting your fitness journey or looking for a reliable pre-workout to get more out of your sessions, C4 delivers. Just be sure to follow the serving instructions and stay hydrated!

Bought these cause they were the cheapest and the flavor is great. Will be buying more

Good taste , less caffeine then the ultimates have. Price is good as long as you are comparing them to what your local stores are selling individual ones for

Tastes great. No “diet” flavor like you get with many sugar free drinks.

It does actually say on the can that there's no skittles in the product. The fact that it's just generic skittles flavour too is a little bit of a red flag. It just generally tastes sweet and vaguely berry/fruity flavoured. This being said, I love C4 energy drinks and always enjoy trying a new flavour to keep me going through a long shift and found this to be a fun one to enjoy. People frequently were interested and asking me about this at work so I think it markets itself well. I think if it's on a reduced price it's probably worth a purchase and try.

Taste not so good, cotton candy by far much better