For a garden party, check the sugar declaration and the caffeine in the whole can: no added sugar does not necessarily mean zero sugar or caffeine-free. Red Bull states that its 250 ml Sugarfree can contains 80 mg of caffeine, while Monster Energy lists 150 mg and 0 g sugar for a 500 ml Ultra can. Offer non-caffeinated drinks alongside energy drinks, especially when guests include children or pregnant people.
Keep water and non-caffeinated drinks alongside energy drinks. Can size matters too: Red Bull states that Sugarfree contains 80 mg of caffeine per 250 ml can, while Monster Energy lists 150 mg per 500 ml Ultra can.
Check the exact variant rather than relying on its flavour or brand name. Red Bull says its sugarfree drinks use sweeteners instead of sugars; sugarfree does not mean unsweetened or caffeine-free.
Provide non-caffeinated choices rather than making energy drinks the default. NHS guidance advises no more than 200 mg of caffeine a day during pregnancy, counting caffeine from drinks and food together.
Start with the sugar requirement, then compare caffeine per whole can and choose portions that suit the adult guests you expect.
| Priority | What to check | Your needs |
|---|---|---|
| Sugar declaration | Read the sugars figure and ingredients on the exact variant. “No added sugars” and “zero sugar” are different claims; sweeteners may also be present. | If I want zero sugar, a no-added-sugar claim alone will not settle the choice. I need the sugars figure for the drink I am serving. |
| Caffeine per can | Compare whole-can amounts, not just can size: Red Bull states 80 mg in 250 ml Sugarfree; Monster Energy lists 150 mg in 500 ml Ultra. Check the exact pack before serving. | For smaller individual servings, I would compare 250 ml cans; guests choosing 500 ml cans should know how much caffeine the whole can contains. |
| Mixed guest list | Read high-caffeine warnings and provide non-caffeinated drinks. NHS guidance advises no more than 200 mg of caffeine a day during pregnancy, from all sources. | With children or pregnant guests coming, I want water and other non-caffeinated options available without anyone having to choose an energy drink. |
| Flavour and variant | Check each flavour’s full product name and sugar declaration. Red Bull lists sugarfree Editions, while Monster Energy lists several Ultra flavours. | I can offer different flavours without assuming that every drink under the same brand has the same sugar content. |
| Energy drink or soft drink | Decide whether guests want a caffeinated energy drink at all. Lucozade describes Zero as a zero-sugar soft-drink range and separately describes Lucozade Energy as containing glucose. | If I mainly need another zero-sugar refreshment, a soft drink may fit that role without being presented as an energy drink. |
Can size does not tell you the caffeine dose. Red Bull states 80 mg per 250 ml Sugarfree can; Monster Energy lists 150 mg per 500 ml Ultra can.
Read the caffeine amount for the whole can and make non-caffeinated drinks available too.
Sugarfree energy drinks can still contain caffeine. UK government food-labelling guidance requires a high-caffeine warning on drinks, other than tea or coffee, containing more than 150 mg of caffeine per litre; the warning says they are not recommended for children or pregnant or breast-feeding women.
Check the pack warning and provide non-caffeinated choices for a mixed guest list.
Ranges can have different sugar declarations: Lucozade describes Zero as zero sugar and its separate Energy range as containing glucose.
Check the exact product name, nutrition panel and ingredients for each flavour or multipack.
These references help distinguish product ranges and pack formats; a brand name alone does not confirm the contents of a particular can.
Its UK sugarfree range includes 250 ml Sugarfree cans and sugarfree Editions.
The UK Ultra range provides 500 ml zero-sugar energy-drink options in several flavours.
A Relentless promotion identifies a 500 ml Zero Sugar Raspberry variant.
Its Zero soft-drink range serves a different purpose from a caffeinated energy-drink selection.
Its grocery listings provide examples of Red Bull Sugar Free and Monster Ultra multipack formats.
These options include smaller 250 ml cans and larger 500 ml cans. PerfectTed is a no-added-sugar option, while the other listed drinks are presented as sugarfree or zero sugar; check the distinction if you need a drink with no sugars.
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A smaller individual-can option for guests choosing a sugarfree energy drink. Red Bull states that Sugarfree contains 80 mg of caffeine per 250 ml can; sugarfree does not mean unsweetened or caffeine-free.
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A 250 ml matcha energy-drink option for guests looking for no added sugars. This variant contains sugars from fruit juice, so check its sugars figure if the requirement is zero sugar.
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A smaller zero-sugar energy-drink format. Check the caffeine declaration on the whole can before comparing it with other 250 ml drinks; do not assume it matches Red Bull Sugarfree.
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A larger zero-sugar can for adult guests who want that serving size. Check the caffeine declaration on the exact can before serving: the product listing’s concentration differs from the figure on Monster Energy’s UK Ultra page.
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A 500 ml zero-sugar energy-drink option for adults choosing a larger can. Check its own whole-can caffeine declaration rather than applying the figure for Monster Ultra to this variant.
No. Sugar and caffeine are separate checks: Red Bull states that Sugarfree contains 80 mg of caffeine per 250 ml can, and Monster Energy lists 150 mg and 0 g sugar for a 500 ml Ultra can. Read both declarations on the drink you choose.
Choose by the portion adult guests want and the caffeine in the whole can. For the examples with manufacturer figures, Red Bull Sugarfree contains 80 mg per 250 ml can, while Monster Energy lists 150 mg per 500 ml Ultra can; do not apply either figure to a different variant.
Sugarfree does not remove caffeine. NHS guidance advises no more than 200 mg of caffeine a day during pregnancy, including caffeine from drinks and food, so the whole day’s intake matters. Provide non-caffeinated drinks as another option.
UK government food-labelling guidance requires a high-caffeine warning on drinks other than tea or coffee that contain more than 150 mg of caffeine per litre; the warning says they are not recommended for children. In July 2026, the Department of Health and Social Care described an under-16 sales ban for England as intended legislation, not an established UK-wide rule. Check current rules where the event takes place and offer non-caffeinated drinks.
Treat it as a zero-sugar soft-drink option, not as a confirmed energy-drink equivalent. Lucozade describes its Zero range as zero sugar and describes the separate Lucozade Energy range as containing glucose.