Regular zero-sugar energy-drink buyers
If you stock cans for work, study, commuting or gaming, compare caffeine per complete can as well as the sugar claim. Check the ingredients if particular sweeteners matter to you.
Who is this choice for?
The useful comparison changes with who will drink the cans and how a weekly shop is shared.
Weekly shoppers choosing multipacks
A four-pack, 12-pack and larger case represent different quantities to store and use. Compare the number of cans, their volume and the caffeine in each can before committing to a case.
Households managing access to caffeinated drinks
If children may reach drinks stored at home, consider where a multipack will go. Shoppers buying for someone who is pregnant or breastfeeding should also read the product warning rather than treating zero sugar as a suitability claim.
What should you compare?
Start with the drink in one can, then decide whether the pack quantity suits the household.
| Priority | What to check | When it matters |
|---|---|---|
| Sugar and sweeteners | Check the sugar statement and ingredient list for the exact variety. Red Bull says Sugarfree replaces sugar with sucralose and acesulfame K; Monster Energy UK lists 0g sugar for its 500ml Ultra and Zero Sugar examples. | I want a zero-sugar drink, but I also want to know which sweeteners are in the can before buying several. |
| Caffeine per can | Compare the whole-can amount, not just a figure per 100ml. Red Bull lists 80mg in 250ml Sugarfree; Monster Energy UK lists 150mg in 500ml Ultra and 160mg in 500ml Zero Sugar. | A smaller can suits me when I want the lower per-can amount among these examples. If I choose 500ml, I need to account for other caffeinated drinks too. |
| Pack quantity | Check both the can count and volume. Tesco Groceries lists zero-sugar drinks in multiple pack formats; check the exact variety and format when you shop. | Will this quantity fit where I store drinks, and is it likely to be used before its best-before date? |
| Household access | Read each can’s warnings and the delivery terms. A Joybuy Red Bull Sugarfree case listing specifies age verification on delivery. | When children live in or visit the household, I need a place to store caffeinated cans away from unrestricted shared access. |
What is easy to overlook?
-
Reading “zero sugar” as “little caffeine”
Monster Energy UK lists 0g sugar alongside 150mg caffeine in a 500ml Ultra can and 160mg in a 500ml Zero Sugar can. The sugar claim does not describe the caffeine amount.
Compare caffeine per complete can, then consider any coffee, tea, cola or other energy drinks you also consume.
-
Choosing a case by can count alone
Twelve 500ml cans and twelve 250ml cans provide different amounts per serving and take up different amounts of storage space. A case can also make a larger can the routine choice when a smaller one would have suited the occasion.
Check the can volume, caffeine per can, storage space and best-before date alongside the number of cans.
-
Committing to a flavour before checking its ingredients
Red Bull Sugarfree and the listed Monster zero-sugar products use sweeteners. A sugar-free label does not tell you whether you will like the flavour or want those ingredients.
Read the ingredient list for the exact pack and, where practical, try a single can before buying a large case.
Which brands and retailers are relevant?
These references help distinguish drink formats and grocery pack options; they do not indicate that every variety is in stock.
Red Bull
Red Bull Sugarfree is a smaller-can zero-sugar reference for comparing caffeine per serving.
- Red Bull states that a 250ml Sugarfree can contains 80mg caffeine and replaces sugar with sucralose and acesulfame K.
- Sugarfree is still a caffeinated, sweetened drink; check the ingredient label on the exact pack you buy.
Monster Energy
Its UK Zero Sugar and Ultra product information provides two 500ml zero-sugar examples with different stated caffeine amounts.
- Monster Energy UK lists 0g sugar and 160mg caffeine for a 500ml Zero Sugar can, and 0g sugar and 150mg caffeine for a 500ml Ultra can.
- Both stated per-can caffeine amounts exceed Red Bull’s stated 80mg for a 250ml Sugarfree can; compare the exact variant and serving before choosing a case.
Relentless
Relentless is worth checking if its flavours appeal, but an older product reference should not stand in for today’s can label.
- Relentless Energy’s 2024 promotional terms identify a 500ml Zero Sugar Raspberry can.
- Check a current listing and the exact can for its ingredients and caffeine amount before adding it to a weekly shop.
Tesco
Tesco Groceries is a retailer reference for comparing zero-sugar varieties and pack formats during a weekly shop.
- Its energy-drink category lists Red Bull Sugar Free, Red Bull Zero, Monster Zero Sugar and Monster Ultra in multipack formats.
- Check the exact pack and local availability when shopping; listings and offers can change.
Joybuy multipacks to consider
These energy-drink multipacks include flavoured CELSIUS cases, smaller Red Bull Sugarfree cans and a larger-can Monster Green Zero Sugar case. Compare the label on each exact pack against the sugar, caffeine and storage considerations above.
No image available
CELSIUS Watermelon Strawberry 12 × 355ml
For a weekly shop where watermelon and strawberry flavour appeals, this is a case of twelve 355ml cans. Check the exact can label for sugar, sweeteners and caffeine before choosing a case.
No image available
CELSIUS Kiwi Guava 12 × 355ml
This twelve-can case is an option if kiwi and guava flavour suits the intended drinkers. Each can is 355ml; check its sugar, ingredient and caffeine information against your weekly-shop needs.
No image available
Red Bull Sugarfree 12 × 250ml
Choose this format when smaller individual cans matter more than a larger serving. The pack contains twelve 250ml Red Bull Sugarfree cans; Red Bull states that each 250ml can contains 80mg caffeine and uses sweeteners in place of sugar.
No image available
Monster Energy Green Zero Sugar 12 × 500ml
This case suits a shop planned around larger individual cans rather than 250ml servings. The Joybuy listing identifies twelve 500ml zero-sugar cans and names sucralose and acesulfame K; check caffeine per can on the exact pack.
No image available
Red Bull Sugarfree 24 × 250ml
This larger case keeps the individual 250ml can format while increasing the number of cans to store. Red Bull states that a 250ml Sugarfree can contains 80mg caffeine; check the ingredient label on this exact case, particularly if you avoid specific sweeteners.
Common questions
Does zero sugar mean an energy drink is low in caffeine?
No. Monster Energy UK lists 0g sugar with 150mg caffeine in a 500ml Ultra can and 160mg in a 500ml Zero Sugar can. Compare caffeine per whole can and include other caffeinated drinks when considering what you will consume.
How do I use the caffeine figure on a UK can?
Check the stated caffeine per 100ml alongside the can volume, so you understand the amount in the whole can. Department of Health and Social Care material says that drinks other than tea or coffee containing more than 150mg caffeine per litre require a high-caffeine warning and a declaration of caffeine in mg per 100ml.
Does zero sugar make an energy drink suitable during pregnancy or breastfeeding?
No: removing sugar does not remove caffeine or the need to read warnings. Department of Health and Social Care material says the required warning on high-caffeine drinks states that they are not recommended for pregnant or breastfeeding women. Seek individual advice from a maternity professional or clinician.
What should I check when storing a weekly-shop multipack?
Check the product’s storage instructions and best-before date, then choose a place appropriate for the household. If children live in or visit the home, do not leave high-caffeine cans in unrestricted shared storage.