Shoppers comparing caffeine per can
A multipack makes it easy to keep cans on hand, but the amount of caffeine in one can changes with the drink and serving size. Compare the full can before moving between 250ml and 500ml formats.
Who is choosing a multipack?
Shoppers comparing sugar by variant
Original and zero-sugar drinks can sit within the same brand range. Check the exact flavour and its nutrition panel rather than relying on the brand name.
Households planning a small top-up
Can count and can volume both matter when deciding how many individual drinks to keep and where the pack will fit. An eight-pack of 250ml cans gives different portions from four 500ml cans, even though both contain 2 litres.
What should you check first?
Start with the amount you would drink at one time, then compare the exact variant’s label and the number of cans you want to store.
| Priority | What to check | Your needs |
|---|---|---|
| Caffeine per can | Compare the caffeine figure for the full can, not just per 100ml. Red Bull UK lists 80mg in Original 250ml; Monster Energy UK lists 150mg in Ultra 500ml and 160mg in Zero Sugar 500ml. | I want to know how much caffeine is in the can I plan to drink, particularly when changing can size. |
| Sugar and variant | Read sugars per can and confirm the precise flavour. Red Bull UK lists 27g sugars in Original 250ml; Monster Energy UK lists 0g in its Ultra and Zero Sugar 500ml variants. | A zero-sugar variant matters to me, so I need to distinguish it from an original sweetened drink in the same range. |
| Pack format | Check both can count and volume, then consider how many individual portions you will use and store. Do not treat an eight-pack of 250ml cans as eight 500ml portions. | For a small top-up, I would rather choose a pack with cans I expect to use than select by can count alone. |
| Drink type | Check the drink’s description and caffeine label before substituting one range for another. Lucozade describes Lucozade Energy as containing glucose; that description does not establish the caffeine amount in a particular multipack. | If I am switching from a high-caffeine drink, I want to compare the actual labels rather than assume a glucose-containing drink serves the same purpose. |
| Pack warnings | Read the warning on the exact can, especially when buying for a household. Red Bull Sugar Free and Sainsbury’s Blue Bolt Zero listings carry high-caffeine warnings concerning children and pregnant or breast-feeding women. | Other people may have access to the multipack, so I need to check who the label says should avoid it. |
Common buying mistakes
-
Assuming a larger can has the same caffeine profile
Can size and formula both affect the amount in a serving. Red Bull UK lists 80mg caffeine in Original 250ml; Monster Energy UK lists 150mg in Ultra 500ml and 160mg in Zero Sugar 500ml.
Compare caffeine per full can on the exact pack before changing formats, and account for other drinks containing caffeine that day.
-
Choosing an original flavour when you want zero sugar
Sugar figures differ across variants: Red Bull UK lists 27g sugars in Original 250ml, while Monster Energy UK lists 0g in its Ultra and Zero Sugar 500ml drinks.
Check the variant name and nutrition panel on the pack you are buying; do not apply one flavour’s figures to the whole range.
-
Overlooking warnings on a household multipack
A multipack may be accessible to people other than the buyer. Retailer listings for Red Bull Sugar Free and Sainsbury’s Blue Bolt Zero show high-caffeine warnings, including advice concerning children and pregnant or breast-feeding women.
Read the warning on each type of can and consider who will have access to the pack before storing it.
Brands and ranges to recognise
These references help distinguish drink formats and variants; a brand name alone does not establish the contents of every can in its range.
Red Bull
A 250ml-can range with Original and Sugar Free multipack listings.
- Red Bull UK lists 80mg caffeine and 27g sugars in an Original 250ml can.
- Original’s sugar figure must not be applied to Sugar Free; check the exact variant’s label.
Monster Energy
A 500ml-can range that includes Original Green, Ultra and Zero Sugar variants.
- Monster Energy UK lists 150mg caffeine and 0g sugar for Ultra 500ml, and 160mg caffeine and 0g sugar for Zero Sugar 500ml.
- Monster Energy UK lists 55g sugar in Original Green 500ml; figures for one variant should not be transferred to another.
Relentless
Relentless Origin is listed in a four-pack of 500ml cans.
- Tesco’s Relentless Origin listing gives 19g sugars per 500ml can.
- Origin is not a zero-sugar choice.
Lucozade Energy
A glucose-containing sparkling-drink range listed in 380ml-can multipacks.
- Lucozade identifies glucose as an ingredient in its Energy range.
- Check the particular can’s caffeine information before treating it as interchangeable with a high-caffeine energy drink.
Sainsbury’s Blue Bolt
An own-label range that includes Blue Bolt Zero in six-packs of 250ml cans.
- Sainsbury’s lists less than 0.5g sugar per Blue Bolt Zero 250ml can and 30mg caffeine per 100ml.
- Its product listing carries warnings concerning under-16s, pregnant or breast-feeding women, people with heart disease and people sensitive to caffeine.
Tesco
A retailer listing multipacks from several drink brands, rather than a drink range with one shared formulation.
- Its energy-drink listings include different can sizes and pack counts across Red Bull, Monster, Relentless and Lucozade.
- Compare the exact product labels; the retailer name does not identify a common caffeine or sugar content.
Joybuy multipack options
These packs offer 250ml Red Bull cans, 355ml CELSIUS cans and 500ml Monster cans for comparing individual portions and pack counts. Check each product’s current label for details beyond those stated here.
No image available
Red Bull Energy Drink 250ml 12 Pack
Twelve 250ml cans suit a top-up that calls for individual smaller cans. Red Bull UK lists 80mg caffeine per Original 250ml can; this is the sweetened Original variant, so check its nutrition panel if sugar content affects your choice.
No image available
CELSIUS Kiwi Guava 12 x 355ml
The twelve 355ml cans provide a portion size between the 250ml and 500ml formats discussed here. Check the Kiwi Guava can’s caffeine, sugar and warning information before choosing it in place of another drink.
No image available
Red Bull Zero Energy Drink 250ml 8 Pack
Eight 250ml cans offer smaller individual portions than the 500ml packs. Confirm the Zero variant’s caffeine figure, nutrition information and warnings on the current can rather than applying figures from Red Bull Original or Sugar Free.
No image available
Monster Energy Original Green 9 x 500ml
Nine 500ml cans suit shoppers deliberately choosing the larger Original Green serving. Monster Energy UK lists 160mg caffeine and 55g sugar per Original Green 500ml can; do not use the sugar figures for its zero-sugar variants as a substitute.
No image available
Monster Energy Ultra Rosa 4 x 500ml
Four 500ml cans provide a smaller pack count than the nine-can Monster Original Green option, while retaining a larger individual can. Check Ultra Rosa’s own caffeine figure, nutrition panel and warnings rather than applying figures from another Monster Ultra variant.
Questions about energy-drink multipacks
How should I compare caffeine in different can sizes?
Compare caffeine per full can, using the exact variant’s label. Red Bull UK lists 80mg in Original 250ml; Monster Energy UK lists 150mg in Ultra 500ml and 160mg in Zero Sugar 500ml. If a label gives only a per-100ml figure, account for the whole can volume.
Is an under-16 sales restriction already in force across the UK?
The Department of Health and Social Care and Department for Education announced on 16 July 2026 a planned restriction for England, not a UK-wide rule already in force. It would prohibit sales to under-16s of drinks containing more than 150mg caffeine per litre from April 2027, subject to Parliamentary approval. Check the applicable rules and retailer requirements when purchasing.
What should I check on a high-caffeine multipack?
Read the caffeine amount and warning on the exact cans, as well as their nutrition panels. Listings for Red Bull Sugar Free and Sainsbury’s Blue Bolt Zero carry warnings concerning children and pregnant or breast-feeding women; do not assume another variant has identical figures or wording.