Parents buying shared half-term snacks
Keep drinks intended for children separate from caffeinated energy drinks. A zero-sugar label does not remove a product’s caffeine warning.
Who is shopping?
Adults choosing a zero-sugar energy drink
If you want a caffeinated drink without sugar, compare the caffeine in a complete can as well as the can size and sugar figure.
Shoppers choosing family refreshments
If you want a sugar-free flavoured drink rather than an energy drink, look at non-energy soft drinks and check the exact pack label.
What should you check?
Decide who will drink it and whether they want an energy drink before comparing sugar claims, caffeine and pack sizes.
| Priority | What to check | Your needs |
|---|---|---|
| Drinks for children | Read caffeine content and any warning against consumption by children. A zero-sugar claim does not cancel that warning. | If children might drink it, I want a family refreshment rather than a high-caffeine energy drink. Sainsbury's says it does not sell high-caffeine energy drinks to under-16s. |
| Caffeine per can | Compare the caffeine figure with the full can size, not just the amount per 100 ml. Red Bull UK states 80 mg per 250 ml can of Red Bull Sugarfree. | For an adult choosing an energy drink, I want to know how much caffeine is in the container I might finish. |
| Sugar and drink type | Check the exact variant’s sugar figure and whether it is an energy drink or a non-energy soft drink. Lucozade describes its Zero range as zero sugar. | I want a sugar-free flavoured drink, but I do not necessarily want an energy drink. |
| Ingredients and warnings | Read the ingredient list and cautions on the pack you are buying. Sainsbury's Monster Zero Sugar listing warns against consumption by children, pregnant or breastfeeding women, and people sensitive to caffeine. | Before choosing a drink for myself or someone else, I need to check whether its stated warnings apply. |
Common buying mistakes
-
Assuming zero sugar means suitable for children
A sugar-free energy drink can still contain caffeine and carry a warning against consumption by children. The warning on Sainsbury's Monster Zero Sugar listing applies despite its zero-sugar name.
For shared half-term refreshments, choose from non-energy drinks instead of treating an energy drink’s sugar claim as a suitability check.
-
Comparing caffeine figures without checking can size
A per-100 ml figure does not tell you the amount in a complete can on its own. Red Bull UK, for example, states 80 mg of caffeine in a 250 ml can of Red Bull Sugarfree.
Check the caffeine amount and container volume for the exact variant you plan to drink.
Relevant brands and retailers
Red Bull
Red Bull Sugarfree is a smaller-can example for adults comparing zero-sugar energy drinks.
- Red Bull UK states 80 mg of caffeine in a 250 ml can of Red Bull Sugarfree.
- Sugarfree remains a caffeinated energy drink, not a child-focused snack drink.
Monster
Monster Zero Sugar is an example of a larger-can, zero-sugar energy drink for adult shoppers.
- Sainsbury's lists Monster Zero Sugar in 500 ml cans and states 32 mg of caffeine per 100 ml.
- That listing says it is not recommended for children, pregnant or breastfeeding women, or people sensitive to caffeine.
Lucozade
Lucozade Zero offers a non-energy soft-drink route when the aim is a sugar-free flavoured drink.
- Lucozade describes its Zero soft-drink range as zero sugar.
- Check the exact variant rather than assuming it serves the same purpose as an energy drink.
Relentless
Relentless is relevant when checking energy-drink variants, but the exact product label matters.
- Relentless identifies caffeine in its Guava variant’s ingredient information.
- The Guava page says the drink is not recommended for children, people sensitive to caffeine, pregnant women or women who are nursing; it does not establish a zero-sugar claim for that variant.
Sainsbury's
Sainsbury's provides product warnings and an age-verification policy relevant to energy-drink shopping.
- Its product listings include caffeine information that can help shoppers check the exact drink.
- Sainsbury's says it does not sell high-caffeine energy drinks to under-16s and age-verifies products labelled as not recommended for children. This is a retailer policy, not a UK-wide statutory rule.
Joybuy product options
These options cover zero-sugar energy drinks for adults and a non-energy soft drink for a different half-term refreshment choice. Check each exact pack’s ingredients and warnings before buying for someone else.
No image available
Monster Energy Ultra Zero Sugar 4 × 500 ml
An energy-drink option for an adult seeking a zero-sugar variant. Check the caffeine amount on this Ultra pack rather than applying figures for a different Monster variant; do not choose it as a child-focused snack drink.
No image available
Red Bull Sugarfree Energy Drink 4 × 250 ml
A smaller-can energy-drink option for adults comparing sugar-free variants. Red Bull UK states 80 mg of caffeine per 250 ml can of Red Bull Sugarfree; it remains a caffeinated drink, so check the pack’s warnings and ingredients.
No image available
7UP Zero 24 × 330 ml
A non-energy soft-drink option for shoppers who do not want an energy drink in their half-term selection. Check the exact pack’s sugar information, ingredients and suitability for the intended drinker.
Questions about half-term drinks
Does zero sugar make an energy drink suitable for children?
No. Zero sugar does not remove caffeine or a warning against consumption by children. Sainsbury's says it does not sell high-caffeine energy drinks to under-16s and age-verifies products labelled as not recommended for children.
Does a zero-sugar energy drink contain caffeine?
It can. Red Bull UK states that a 250 ml can of Red Bull Sugarfree contains 80 mg of caffeine. Check the caffeine figure on the exact variant and compare it against the size of the whole container.
What should an adult compare between diet energy drinks?
Compare the exact variant’s sugar information, caffeine per complete can, can size, ingredients and warnings. For instance, Sainsbury's lists Monster Zero Sugar at 32 mg of caffeine per 100 ml in a 500 ml can and gives warnings for several groups, including people sensitive to caffeine.
Is an under-16 energy-drink sales ban already in force across the UK?
Do not treat the announced measure as a current UK-wide statutory ban. The Department of Health and Social Care and Department for Education announced an England-only under-16 sales ban for high-caffeine energy drinks intended from April 2027, subject to Parliamentary approval. Separately, Sainsbury's says its retailer policy already restricts sales of high-caffeine energy drinks to under-16s.