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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
You want a lift without drinking your day’s sugar in one go. The short answer: pick a can that prints its caffeine number and keeps sugar at zero, then choose a gentle 80mg sipper or a full 300mg jolt. Below are seven zero-sugar cans compared on the numbers that change your day — caffeine per can, can size, and calories — plus the honest catch on each one.
This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Some cans here run 80mg of caffeine and others run 300mg, and that spread is the whole story. Read on for the 0 calorie energy drinks that fit how much lift you actually want.
Top Picks
How To Choose The Best 0 Calorie Energy Drinks
Buying a zero-sugar energy drink is really two questions: how much caffeine do you want in one sitting, and how much liquid do you want to drink to get it? Get those two right and the flavour list becomes the fun part instead of the deciding part.
Start with caffeine per can, not per bottle
Caffeine is the active ingredient, and the cans in this group range from 80mg in an 8.4 fl oz Red Bull can up to 300mg in a 16 fl oz Bang can. If you are a coffee drinker who wants a top-up at 3pm, the low end is plenty. If you are chasing a hard training session, the high end is what you are actually after. Check the number on the can, not the size of the can — they are not the same thing.
Then decide your can size
A 12 fl oz can is the common middle ground and is easy to finish in one go. A 16 fl oz can gives you more liquid to sip over a longer stretch, which suits a desk or a long drive. An 8.4 fl oz can is a small, quick hit that fits a pocket or a gym bag. None of these is better — they are different habits.
Read what “zero” actually covers
Zero sugar and zero calories are not always the same promise. Monster Zero Ultra states 10 calories and zero sugar. Bang states zero sugar and zero calories. Alani Nu says 10 calories and 0g of sugar on the can. If calories are your hard line, read the line on the label rather than the word “zero” on the front.
Side-by-Side Comparison
| Model | Best For | Caffeine Per Can | Can Size | Calories | Amazon |
|---|---|---|---|---|---|
| Monster Energy Zero Ultra★ Best Overall | Everyday lighter-tasting lift | — | 16 fl oz | 10 | Amazon |
| CELSIUS Assorted Flavors Variety PackTop Performer | Fitness-focused daily can | 200mg | 12 fl oz | — | Amazon |
| Alani Nu Variety Pack | Flavour variety with B vitamins | 200mg | 12 fl oz | 10 | Amazon |
| Red Bull Sugarfree Variety Pack | Small, gentle cans | 80mg | 8.4 fl oz | 10 | Amazon |
| Bang Energy Any Means Orange | Maximum caffeine hit | 300mg | 16 fl oz | Zero | Amazon |
| NOS Zero Sugar | Workday focus boost | 160mg | 16 fl oz | — | Amazon |
| REIGN Storm Tropical | Workout and long-day sipping | 200mg | 12 fl oz | — | Amazon |
Detailed Reviews
1. Monster Energy Zero Ultra, Sugar Free Energy Drink, 16 Ounce
Our pick — 4.5+★ from 35,500+ verified ratings; the strongest balance of quality and price.
The white can that made zero-sugar energy taste like something you actually want to drink.
Zero Ultra is the pick for anyone who wants a full 16 fl oz can that drinks light instead of syrupy. It lists 10 calories and zero sugar, with a sparkling citrus flavour the maker describes as less sweet than its regular line. That lighter profile makes it an all-day can rather than a pre-gym one — sip it through a morning of desk work without the cloying aftertaste of full-sugar cans.
What wins people over is the taste, and the numbers show it: taste is far and away the most-discussed thing on this can, with flavour close behind. Owners describe a steady lift without the jittery edge they expect from a 16 fl oz can. The calorie figure is the other quiet selling point — 10 calories is low enough that most people stop counting it.
Weight is worth a note because this is a stock-up buy: a single can works out to 1.04 pounds of shipping weight, so a 15-pack lands as a genuinely heavy box. Plan a shelf or a fridge drawer for it rather than a cupboard you have to lift into.
What earns the top spot
- 10 calories and zero sugar in a full 16 fl oz can
- Lighter, sparkling citrus profile that does not wear out your palate
- Steady lift without the jittery edge, according to the owner consensus
- Taste and flavour dominate the feedback for good reason
Where it asks a little of you
- A multi-can box ships heavy — 1.04 pounds per can
- Cans can arrive dented if the box takes a knock
- The less-sweet profile will read as flat if you like a bold, sugary-style hit
Reach for this if: you want one big can that carries you through a workday on 10 calories and no sugar.
Look elsewhere if: you need a hard caffeine number printed on the label — this one does not state one on the pack.
2. CELSIUS Assorted Flavors Variety Pack
A 12-can flavour sampler built around 200mg of caffeine and a fitness-first ingredient list.
If you want the caffeine figure spelled out before you buy, CELSIUS puts it right on the pack: 200mg per can in a 12 fl oz size. That is enough for a real pre-workout lift without going into the extreme range. The ingredient story goes further than most — 7 essential vitamins, no sugar, no high fructose corn syrup, no aspartame, and no artificial flavours or colours. It is also gluten-free, Kosher, Non-GMO and certified vegan, which is more dietary legwork than most cans in this group do.
The variety pack is where this one splits opinion. The flavour selection is broad and the cola stands out as a favourite, but some buyers find the box does not contain every option the listing shows. Treat the pack as a lucky dip of flavours rather than a guaranteed checklist, and you will be happier with what lands.
Where it beats the Red Bull below is straightforward: 200mg of caffeine against 80mg, in a can that costs the same kind of money across a 12-pack. Where it falls short of the Monster is the calorie line — Monster states 10 calories on the label, while CELSIUS leads with its vitamin and no-sugar list instead of a calorie figure.
The fitness angle: 200mg caffeine, 7 essential vitamins, and a clean no-sugar, no-aspartame, no-artificial-colour formula give this one a real position for gym days.
The honest catch: the variety box can arrive without every flavour the listing advertises, so buy it for the range, not for a specific flavour you saw in the photos.
Best fit for: a fitness routine that wants a named caffeine dose and a cleaner ingredient panel.
Think twice if: you are buying specifically for one flavour — the assortment varies.
3. Alani Nu VARIETY PACK
Three dessert-style flavours, 200mg of caffeine, and a 10-calorie can that does not taste like a compromise.
The flavours are the reason to buy this box. Cherry Twist, Pink Slush and Orange Kiss are the kind of names that usually come with a sugar hit, and here they arrive with 200mg of caffeine, 10 calories and zero sugar in a 12 fl oz can. It is lightly carbonated, so it drinks smoother than a sharp, fizzy can. Alani Nu also packs in vitamins B5, B6 and B12 plus biotin, and the whole thing is vegan, gluten-free and made without artificial colours.
Flavour is what sells it, with value for money the next thing people bring up. That combination makes sense: you are getting a 12-pack of distinct dessert flavours rather than twelve cans of the same thing. The 200mg reads as a steady, no-jitters lift rather than a spike.
Size is the practical split from the Monster and the Bang. This is a 12 fl oz can, and the box measures 9 x 6.75 x 6.16 inches — a chunkier shelf footprint than the tall slim CELSIUS box at 2.25 x 2.25 x 6.25 inches, so measure your cupboard before it arrives. The label is also clear on one more thing: it is not recommended for children, anyone sensitive to caffeine, pregnant women or women who are nursing.
What you are really buying: a flavour-first 12-pack at 200mg caffeine and 10 calories a can, with B vitamins and biotin added.
Worth knowing: the box is a wide one at 9 x 6.75 x 6.16 inches, so it needs a shelf with room rather than a tight door pocket.
Pick this one when: the flavour rotation is what keeps you reaching for a can instead of a coffee.
Pass if: you want a single bold caffeine number and no sweet-leaning flavours at all.
4. Red Bull Sugarfree Energy Drink, Variety Pack
The small-can option for people who want a gentle lift, not a full afternoon of it.
At 80mg of caffeine in an 8.4 fl oz can, this is the lightest option in the group by a wide margin — less than half the 200mg you get in the CELSIUS or the Alani Nu. That is the point of it. If a big 16 fl oz can leaves you wired at bedtime, the small format gives you a smaller dose in a smaller drink. Each can also carries taurine and four B vitamins (B3, B6, B12 and B5) plus 10 calories, and it is made to be vegetarian and free from dairy, gluten and lactose.
You get 4 cans each of White Peach, Iced Vanilla Berry and Zero, so 12 cans total across three flavours. White Peach is the one that keeps coming up as the favourite. The flavour tastes sugary without the sugar, which is the trick a sugarfree Red Bull has to pull off.
The trade-off is caffeine per can. Compared with the Bang below — 300mg against 80mg — this is a quarter of the hit, so treat it as a desk drawer top-up or a pre-gym nudge rather than a serious pre-training dose. It is also a small can, so it is gone quickly.
Where the small can shines
- 80mg caffeine in an 8.4 fl oz can — a light, controlled dose
- White Peach, Iced Vanilla Berry and Zero in one 12-can box
- Taurine and four B vitamins in every can
- Vegetarian, dairy-free, gluten-free and lactose-free
What you give up
- 80mg is a fraction of the 300mg in the Bang can
- Small cans empty fast, so a 12-pack disappears quickly
Good match for: light caffeine users, afternoon sippers, and anyone who wants the familiar Red Bull taste without sugar.
Not your can if: you are prepping for a hard session and want a big caffeine number.
5. Bang Energy Any Means Orange
The 300mg heavyweight of the lineup, in a 16 fl oz can with a punchy orange bite.
Bang is the can to choose when the low-caffeine options genuinely do not do the job. It carries 300mg of caffeine in a 16 fl oz can — the highest in this group — and still lands at zero sugar and zero calories. The formula also lists CoQ10, essential amino acids, electrolytes and B vitamins, and it is gluten-free and vegan with no artificial flavours.
The flavour is a bright, zesty orange that leans bold rather than subtle. Owners call the 300mg lift reliable and long-lasting, with no jittery spike or hard crash. Value for money comes up as a strong secondary reason to keep buying.
The obvious caution is the caffeine load. 300mg is a lot for anyone who is not used to it, and it is nearly four times the 80mg in the Red Bull can above. If you are new to energy drinks, start low and work up rather than opening one of these first. A 12-pack also ships at 13.19 pounds, so it is a heavy box to take delivery of.
The headline number: 300mg of caffeine, zero sugar, zero calories, in a full 16 fl oz can — the biggest dose here.
The fair warning: that caffeine load is not a beginner’s can, and a 12-pack arrives as 13.19 pounds of box.
Built for: heavy training days and long shifts where a mild lift will not cut it.
Skip if: you are new to caffeine — the dose is at the top of this list.
6. NOS Zero Sugar: High Performance Energy Drink. 16 Fl oz
A workday can that lists its caffeine at 160mg and adds taurine and guarana for focus.
NOS sits in the middle of the caffeine spread at 160mg per can, which makes it the natural step up from a small Red Bull without going to the extreme end. The formula is built around focus as much as energy: taurine, caffeine, inositol, vitamin B6, guarana and vitamin B12. It comes in a 15-pack of 16 fl oz cans.
The taste lands close to the original full-sugar NOS, which is the main thing buyers care about here — taste is the most-praised aspect by a clear margin, with the zero-sugar fact a close second. Owners keep returning to effectiveness: 160mg that gets them through a shift without the shakiness. One way to think about the can is as a mid-strength, focus-tilted lift rather than a workout-bomb.
Watch the shipping weight. Each 16 fl oz can lines up at 16.58 pounds across the box, and a 15-pack is a seriously heavy delivery — the heaviest per-can shipping weight in this whole group, against 1.04 pounds on the Monster. Make sure you have somewhere to store them before the box lands.
Why it earns a slot: 160mg caffeine with taurine, guarana, inositol and B vitamins gives a mid-strength focus lift, and the taste tracks close to the original.
The practical note: a 15-pack of 16 fl oz cans is a heavy box at 16.58 pounds — plan storage in advance.
Pick this when: you want a middle-strength can that keeps you sharp through a shift.
Look elsewhere if: you want an extreme dose — 160mg is mid-range here.
7. REIGN Storm Tropical
Blood orange meets pineapple in a 200mg can built for the gym bag and the long shift.
REIGN Storm Tropical runs 200mg of caffeine in a 12 fl oz can, the same dose as the CELSIUS and the Alani Nu, but with a fruit-forward tropical flavour that is blood orange and pineapple. That is a tangy-sweet pairing that drinks more like a juice than a typical energy can.
The flavour is the biggest draw, with energy close behind. Owners describe a clean, steady 200mg lift with no jitters, suited to workouts and long shifts alike. Value for money and the caffeine content both come up as reasons people keep buying, and the can is clearly built around the fitness-and-wellness end of the category rather than a desk-snack drink.
Compared with the Alani Nu above, this gives you one tropical profile rather than three dessert flavours, at the same 200mg caffeine. If variety is what keeps you consistent, the Alani box wins. If you want one flavour you actually love in a can sized to a workout, this is the cleaner match.
What it delivers
- 200mg caffeine in a 12 fl oz can sized for a gym bag
- Blood orange and pineapple for a tropical, fruit-forward taste
- Clean, steady lift without jitters, per the owner consensus
- Suits both workouts and long work days
What to weigh first
- One tropical flavour only — no variety in the pack
- 200mg of caffeine is more than a casual sipper needs
For you if: a tropical fruit flavour and 200mg make your gym or shift routine easier.
Give it a miss if: you want a multi-flavour box to keep things varied.
Know the Specs
Caffeine per can (mg)
Caffeine is the active part of any energy drink, measured in milligrams (mg). The cans in this group span 80mg up to 300mg per can, so the number tells you how strong a single drink is. Lower doses suit a coffee-lover wanting a top-up without a jolt; higher doses suit training or long shifts. Always check the mg figure rather than assuming a bigger can means more caffeine — a 16 fl oz can and a 12 fl oz can may carry the same dose.
Sugar and calories per can
Zero sugar and zero calorie sound the same but are not always stated together. Some cans list 10 calories and zero sugar; some state zero sugar and zero calories. Reading both labels is the way to know what you are actually getting. Calories are the figure that drives your daily intake, while sugar is the taste and blood-sugar story. Match the label to your own hard line rather than the word “zero” on the front.
Can size (fluid ounces)
Fluid ounces (fl oz) measure the volume in the can, which sets how long one drink lasts and how much you sip at a time. An 8.4 fl oz can is a quick, small hit; a 12 fl oz can is the middle ground; a 16 fl oz can is a longer sip. A bigger can is not automatically stronger — it may just be more liquid around the same dose.
Added vitamins and ingredients
Beyond caffeine, many cans add B vitamins (like B5, B6, B12), taurine, guarana or biotin. These are listed on the label, and each can in this group tells you its own blend. For some buyers these are the reason they pick one can over another; for others the caffeine number and taste matter more. Read the actual ingredient list on the can rather than the front-of-pack wording.
Common Questions
How much caffeine is in a zero-sugar energy drink?
Is zero sugar the same as zero calories?
Which zero-sugar energy drink has the most caffeine?
Can I drink a zero-sugar energy drink before a workout?
Do I need to be careful about how many cans I drink?
Are these cans vegan and gluten-free?
Will a zero-sugar energy drink keep me up at night?
How should I store a multi-can pack?
Is a 16 fl oz can always stronger than a 12 fl oz can?
What do the B vitamins and other added ingredients do?
The Bottom Line
For most people the winning 0 Calorie Energy Drinks pick is the Monster Energy Zero Ultra. It gives you a full 16 fl oz can at 10 calories and zero sugar, in a lighter citrus profile you can drink through a workday. If you want a named caffeine dose in a fitness-forward can, reach for the CELSIUS Assorted Flavors Variety Pack at 200mg. And when the job needs the biggest hit on the list, grab the Bang Energy Any Means Orange at 300mg.
How we choose
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of November 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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