If children could drink from the shared half-term snack supply, choose a different drink category: the labels for the high-caffeine Red Bull, Monster and Relentless products discussed here say they are not recommended for children. For an adult-only multipack kept separately, compare caffeine in a whole can as well as can size and sugar: the verified 250 ml Red Bull Original contains 80 mg caffeine, while the compared 500 ml Monster Original and Relentless Origin cans contain 160 mg each. A zero-sugar version still needs its own caffeine-label check.
If children can take drinks from the same supply, choose a different drink category. The labels for the Red Bull, Monster and Relentless energy drinks considered here say they are not recommended for children.
Compare the caffeine in one whole can, not just the figure per 100 ml. Red Bull Original contains 80 mg in a 250 ml can; a 500 ml Monster Original or Relentless Origin can labelled at 32 mg per 100 ml contains 160 mg.
Check sugar and caffeine separately. Waitrose lists Monster Ultra Zero Sugar as zero sugar, but its label also gives 30 mg caffeine per 100 ml and says it is not recommended for children.
Decide who can access the drinks before comparing adult-only cans by caffeine, sugar and the details of an online order.
| Priority | What to check | Your needs |
|---|---|---|
| Children’s access | Read the warning on the exact can. Keep an adult-only multipack separate from children’s snacks. | If children can help themselves to the half-term drinks, I need another drink category rather than a different high-caffeine multipack. |
| Caffeine per can | Check the can volume and caffeine per 100 ml, then calculate the whole-can amount. Red Bull Original has 80 mg per 250 ml; Monster Original and Relentless Origin have 160 mg per 500 ml from labels stating 32 mg per 100 ml. | For an adult-only supply, I want to know how much caffeine is in the can I might drink, not only how the small print compares per 100 ml. |
| Sugar | Compare sugar for the same serving size. The supplied product information gives 27 g per 250 ml Red Bull Original can, 19 g per 500 ml Relentless Origin can and 55 g per 500 ml Monster Original can. Check caffeine separately on zero-sugar versions. | If I am choosing between adult-only formats on sugar content, I need the amount per can and the exact product variant. |
| Online ordering | Check current stock and any age-verification requirement before relying on delivery for a particular half-term date. | When I need the multipack for a planned shop, I want to know whether I can order it and complete any delivery checks. |
Multipack packaging does not change the child warnings on the Red Bull, Monster and Relentless products considered here.
Keep an adult purchase separate. For drinks children can take from a shared half-term supply, choose another category.
Can volume changes the amount consumed: at 32 mg caffeine per 100 ml, a 250 ml can contains 80 mg and a 500 ml can contains 160 mg.
Multiply the labelled caffeine per 100 ml by the can volume in ml, then divide by 100. Check that the figure belongs to the exact variant you are buying.
Waitrose lists Monster Ultra Zero Sugar as zero sugar, but its label states 30 mg caffeine per 100 ml and says it is not recommended for children.
Read the caffeine declaration and warning separately from the sugar declaration, particularly when comparing different zero-sugar variants.
The Joybuy listing observed for Relentless Origin 4 Pack stated that age verification was required on delivery; it was out of stock at the time.
Check the current listing, stock and delivery requirements before including a multipack in a time-sensitive shop.
These brand examples describe particular formats, not every drink sold under each name. Check the label of the exact multipack before comparing it with another variant.
Tesco has listed an Original 8 × 250 ml multipack. Product information for the 250 ml Original can gives 80 mg caffeine and 27 g sugars.
The compared formats include 500 ml Original cans and the distinct Ultra Zero Sugar variant.
Tesco has listed Relentless Origin in a 4 × 500 ml format.
A Joybuy campaign named Lucozade Energy Original and Orange in 8 × 380 ml multipack formats.
These Red Bull and Monster can multipacks are options for adults keeping energy drinks separate from children’s half-term snacks. They include 250 ml and 500 ml cans and both Original and sugar-free names; check each variant’s label rather than transferring figures from another one.
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An eight-can, 250 ml format for an adult-only supply. Keep it separate from children’s snacks, and check this Sugar Free variant’s caffeine declaration rather than using the figure for Red Bull Original.
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For adults choosing a 250 ml can: product information for Red Bull Original gives 80 mg caffeine and 27 g sugars per can. Its label says it is not recommended for children, so keep the pack out of a shared children’s snack supply.
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A nine-can pack for adults deliberately choosing the 500 ml Original format. Monster’s GB product data gives 32 mg caffeine per 100 ml, equivalent to 160 mg per can, and 55 g sugars per can; its warning says it is not recommended for children.
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A four-can, 500 ml Zero Sugar variant for an adult-only supply. Check its own caffeine figure before comparing whole cans: figures for Monster Original or Monster Ultra Zero Sugar should not be assumed to apply to this variant. Keep it separate from children’s snacks.
Choose another drink category if children may take from the supply. The labels for the Red Bull, Monster and Relentless high-caffeine products discussed here say they are not recommended for children; an adult-only multipack should be kept separately.
No UK-wide rule follows from the England announcement. In July 2026, the UK Department of Health and Social Care and Department for Education announced a planned ban on sales of high-caffeine energy drinks to under-16s in England from April 2027, subject to Parliamentary approval. Do not treat that planned start date as a rule already in force or extend the announcement to Scotland, Wales or Northern Ireland.
The can size determines how much caffeine the labelled concentration represents. Red Bull Original contains 80 mg in a 250 ml can; Monster Original and Relentless Origin each give 32 mg per 100 ml, which is 160 mg in a 500 ml can.
No. Waitrose lists Monster Ultra Zero Sugar as zero sugar, while its label gives 30 mg caffeine per 100 ml and says it is not recommended for children or people sensitive to caffeine. Read the caffeine declaration on the exact zero-sugar variant you intend to buy.
Yes. The Joybuy listing observed for Relentless Origin 4 Pack stated that age verification was required on delivery. Check the current product page for its delivery requirements and stock before relying on an order for a particular date.