Workers packing one small can
If one drink needs to fit alongside lunch, compare caffeine for the whole can. Red Bull lists 80mg in its 250ml Original, while Monster Energy lists 160mg in its 500ml Original Green.
Who is choosing a multipack?
Shoppers comparing sugars
A sugar-free label answers a different question from the caffeine figure. Sainsbury's lists Red Bull Sugarfree at 0g sugars and 32mg caffeine per 100ml; Joybuy's Monster Ultra Zero Sugar product information lists 0g sugars and 30mg caffeine per 100ml.
People stocking up for several lunches
Check both the number of cans and the volume of each one, then consider storage space and the best-before date. Tesco lists Red Bull multipacks with 250ml cans and Monster multipacks with 500ml cans.
What should you check?
Start with the drink you would actually take to lunch, then compare its caffeine, sugars and pack format.
| Priority | What to check | Your needs |
|---|---|---|
| Caffeine per can | Multiply caffeine per 100ml by the can volume where a per-can figure is absent. Red Bull lists 80mg in its 250ml Original; Monster Energy lists 160mg in its 500ml Original Green. Consider caffeine from other drinks and foods too, as the European Food Safety Authority assesses intake from all dietary sources. | I want to know how much caffeine is in the entire can I would drink with lunch, not just the concentration on the label. |
| Sugars and ingredients | Compare sugars on the same serving basis, and check the ingredient list if particular sweeteners matter to you. Sainsbury's lists 0g sugars per 100ml for Red Bull Sugarfree, alongside 32mg caffeine per 100ml. | A sugar-free can may suit my preference, but I still want to check its caffeine before choosing a case. |
| Can and pack size | Check millilitres per can, the number of cans, storage instructions and the best-before date. Tesco lists both 250ml Red Bull and 500ml Monster multipack formats. | Will one can fit my usual packed lunch, and will I use the pack within its stated date? |
| Warnings | Read the warning on the particular product. The Sainsbury's Red Bull Sugarfree listing warns that its high-caffeine drink is not recommended for children or pregnant or breast-feeding women. | If other people might take cans from the office pack, I want the product warning to be clear to them too. |
Common buying mistakes
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Comparing the number of cans but not caffeine per can
A larger can can change the amount consumed at one lunch. Red Bull states 80mg caffeine in its 250ml Original, compared with Monster Energy's 160mg in a 500ml Original Green.
Calculate the amount for the complete can and consider other caffeine sources that day.
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Assuming sugar-free means caffeine-free
Sainsbury's lists Red Bull Sugarfree at 0g sugars and 32mg caffeine per 100ml. Joybuy's Monster Ultra Zero Sugar information lists 0g sugars and 30mg caffeine per 100ml.
Read the sugars and caffeine lines separately, using the can size to work out the full serving.
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Choosing a large case before checking the format
Pack count and individual can volume are separate decisions: a 500ml can takes up more room in a lunch bag than a 250ml can.
Match the can size and pack count to your planned lunches, and check the best-before date and storage instructions.
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Treating every energy-labelled multipack as canned energy drinks
Sainsbury's lists Lucozade Energy Original as eight 380ml plastic bottles, with 17.1g sugars per bottle. That is a different container and serving format from the canned multipacks here.
Check the container, volume, sugars and stated caffeine amount before substituting one format for another.
Relevant brand ranges
These range details help distinguish formats; they do not indicate which products are in the Joybuy selection below.
Red Bull
Its 250ml Original and Sugarfree cans offer a compact format for comparing sugared and sugar-free drinks.
- Red Bull lists 80mg caffeine and 27g sugars in a 250ml Original can; Sainsbury's lists 0g sugars and 32mg caffeine per 100ml for Sugarfree.
- Sugarfree still contains caffeine and carries a high-caffeine warning in the Sainsbury's listing.
Monster Energy
Its 500ml cans are a larger single-drink format, including Original Green and Ultra variants.
- Monster Energy lists 160mg caffeine and 55g sugar for a 500ml Original Green can. Joybuy's Ultra Zero Sugar information lists 0g sugars and 30mg caffeine per 100ml.
- A 500ml can may be more than the serving someone wants with one packed lunch; check caffeine for the specific variant.
Relentless
A flavour-led range to assess by its individual product label rather than assuming it matches another brand's multipack format.
- Relentless lists caffeine at 0.03% in its Guava product ingredients.
- The Guava product warning says it is not recommended for children, people sensitive to caffeine, pregnant women or women who are nursing. Check the can volume and caffeine per serving when comparing it with a multipack.
Lucozade
Its energy-labelled drinks include formats other than cans, so the product type matters when comparing multipacks.
- Sainsbury's lists Lucozade Energy Original as an eight-pack of 380ml plastic bottles, with 17.1g sugars per bottle.
- The listed bottle ingredients include caffeine; check a stated per-serving amount before comparing caffeine with canned products.
Joybuy multipack options
These cans cover compact 250ml and larger 500ml choices for office lunches, with different pack counts and formulations. Check the individual product label when deciding between them.
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Red Bull Zero 4 x 250ml
Four 250ml cans provide a smaller individual format for packed lunches. If you are choosing Zero for its formulation, check the sugars, sweeteners and caffeine on this product's label.
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Red Bull Sugarfree 250ml 24-pack
The 250ml can is a compact lunch format, while the 24-can case calls for storage space and a best-before check. Sainsbury's lists this Sugarfree variant at 0g sugars and 32mg caffeine per 100ml, equivalent to 80mg caffeine in a 250ml can; follow the warning on the pack.
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Monster Energy Original Green 9 x 500ml
This nine-pack suits someone deliberately choosing a 500ml drink rather than a compact can. Monster Energy lists 160mg caffeine and 55g sugar per 500ml Original Green can; consider the whole serving when comparing it with 250ml options.
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Monster Ultra White 12 x 500ml
The 500ml can and 12-can case suit a routine built around a larger drink, provided there is room to store the pack. Check this Ultra White variant's caffeine and sugars per can rather than applying figures from a different Monster Ultra product.
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Red Bull Energy Drink Original 250ml 8-pack
Eight 250ml cans provide a compact sugared option for planned lunches. Red Bull lists 80mg caffeine per 250ml Original can; check the current pack label for its sugars per can before comparing it with Sugarfree.
Questions about choosing and storing cans
Should I choose a 250ml or 500ml can for lunch?
Choose the volume you would drink and compare caffeine per complete can. Red Bull lists 80mg caffeine in its 250ml Original, while Monster Energy lists 160mg in its 500ml Original Green; those figures apply to those specific drinks, not every can of the same size.
Does sugar-free mean caffeine-free?
No. Sainsbury's lists Red Bull Sugarfree at 0g sugars and 32mg caffeine per 100ml; Joybuy's Monster Ultra Zero Sugar information lists 0g sugars and 30mg caffeine per 100ml. Compare both figures for the particular can you plan to buy.
What should I check before buying a large case?
Check the number and size of the cans, storage instructions and best-before information against your planned lunches. A case of 500ml cans is a different serving commitment from the same number of 250ml cans.
What if someone else might drink a can from the office pack?
Keep the product warning in view when choosing a shared pack. For example, the Sainsbury's Red Bull Sugarfree listing says its high-caffeine drink is not recommended for children or pregnant or breast-feeding women; warnings should be checked on the specific product purchased.