For a workplace lunch, compare caffeine and sugars in the whole can or bottle, not just the drink name or its size. Red Bull states that a 250 ml Red Bull Zero contains 80 mg caffeine, while Monster Energy UK lists 160 mg caffeine and 0 g sugar for a 500 ml Monster Energy Zero Sugar; Joybuy UK lists 0 g sugars for Red Bull Zero. Lucozade Energy Original is a fizzy glucose-based alternative, but Joybuy UK lists caffeine and 4.5 g sugars per 100 ml in its 380 ml bottle, so check the exact pack and account for other caffeine you drink that day.
At lunch, the useful distinction is whether you want to limit the caffeine in one drink, avoid sugar, or choose a glucose-based sparkling drink.
If coffee or tea is already part of your day, compare caffeine in the complete lunch serving. Red Bull states 80 mg per 250 ml Red Bull Zero can; Monster Energy UK lists 160 mg per 500 ml Monster Energy Zero Sugar can.
Red Bull Zero and Monster Energy Zero Sugar are zero-sugar options in the cited UK product information, but both contain caffeine. Check the ingredient list as well if particular sweeteners matter to you.
Lucozade describes its Energy range as sparkling and containing glucose. Joybuy UK lists glucose syrup, caffeine and 4.5 g sugars per 100 ml for the 380 ml Lucozade Energy Original bottle, so it serves a different preference from a zero-sugar drink.
Start with one full can or bottle, then check its ingredients and any warnings relevant to where it will be served.
| Priority | What to check | Your needs |
|---|---|---|
| Whole-serving caffeine | Read the caffeine amount for the full container, or use the stated amount per 100 ml and the container volume. Count caffeine from coffee, tea and other drinks as well. Red Bull states 80 mg per 250 ml Zero can; Monster Energy UK lists 160 mg per 500 ml Zero Sugar can. | I want to know how much caffeine my lunch drink adds to what I have already consumed today. |
| Sugars and sweeteners | Compare sugars per 100 ml with the bottle size, and read the sweetener ingredients. Joybuy UK lists 4.5 g sugars per 100 ml for the 380 ml Lucozade Energy Original bottle, equivalent to 17.1 g per bottle; its ingredients include glucose syrup and caffeine. | A zero-sugar can and a glucose-based fizzy bottle meet different preferences, even if both sit alongside lunch. |
| Pack and serving size | Check the volume of one can or bottle rather than treating a multipack as one serving. Compare products using the same basis: per 100 ml or per complete container. | I usually finish one drink at lunch, so the figures for that whole drink matter more to me than the pack total. |
| Warnings and service rules | Read the exact product warning and check the rules that apply to the canteen. Sainsbury's publishes an under-16 policy for high-caffeine energy drinks; its retailer policy does not establish a rule for another venue. | If the canteen also serves young visitors, I need to distinguish the venue's policy from a retailer's policy. |
Red Bull lists 80 mg caffeine in a 250 ml Zero can, while Monster Energy UK lists 160 mg in a 500 ml Zero Sugar can. Choosing between these drinks on sugar alone misses that difference in the full serving.
Check caffeine per can and include other sources you consume that day before deciding which serving fits.
Joybuy UK lists glucose syrup and 4.5 g sugars per 100 ml in the 380 ml bottle. That works out to 17.1 g sugars per bottle; caffeine is also listed as an ingredient.
If you want a zero-sugar drink, check that claim and the nutrition panel on the exact product instead of relying on the word “energy”.
Sainsbury's says it does not sell high-caffeine energy drinks to under-16s. Separately, the Department of Health and Social Care's England policy page of 16 July 2026 describes an intended sales ban, not an already-active rule established by that page.
Before setting canteen service rules, check the current law for the relevant nation, alongside the venue's and supplier's policies.
These examples show why the variant and container size matter more than the brand name alone.
Its 250 ml Zero and Original cans illustrate two different sugar choices at the same stated volume.
Monster Energy UK lists a 500 ml Zero Sugar can for shoppers considering a larger carbonated serving.
Lucozade describes its Energy range as sparkling and containing glucose.
Relentless Cherry is another carbonated, caffeinated flavour to assess by its own label.
These sparkling lunch-drink options include zero-sugar cans, a peach drink and a glucose-based Lucozade bottle. Compare the exact serving and label for each product rather than assuming the same figures apply across them.
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A larger zero-sugar can for a workplace lunch. Compare caffeine for the complete 500 ml can with other caffeine you have that day, and check the ingredient list if particular sweeteners matter to you.
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A smaller zero-sugar can for comparing one lunch serving. Red Bull states 80 mg caffeine per 250 ml Zero can, and Joybuy UK lists 0 g sugars for this product; it still contains caffeine, so account for other sources.
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For a 355 ml can at lunch, check its caffeine and sugars for the complete serving and read the sweetener ingredients. The pack contains twelve cans; do not use another brand's caffeine figure for this drink.
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A peach-flavoured 250 ml can to compare with other small lunch servings. Check the exact can for total sugars as well as caffeine: “no added sugars” and “zero sugar” do not mean the same thing.
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A fizzy glucose-based option rather than a zero-sugar substitute. Joybuy UK lists glucose syrup, caffeine and 4.5 g sugars per 100 ml, equivalent to 17.1 g sugars per 380 ml bottle. Check the bottle's caffeine declaration if you need to calculate your full lunch serving.
Compare caffeine and sugars in the complete can or bottle, then check its volume and sweetener ingredients. Red Bull states 80 mg caffeine per 250 ml Zero can, whereas Monster Energy UK lists 160 mg per 500 ml Zero Sugar can; looking only at sugar would miss that serving difference.
No. Red Bull Zero and Monster Energy Zero Sugar both contain caffeine according to their respective brand information. Read the caffeine statement on the exact pack before adding it to coffee, tea or other caffeinated drinks.
Count caffeine from all sources, not only the lunch drink. In its 2015 scientific opinion, the European Food Safety Authority said daily intakes up to 400 mg from all sources do not raise safety concerns for adults in the general population; that is not a suggested amount to consume, and individual circumstances can differ.
The NHS advises no more than 200 mg caffeine a day during pregnancy and identifies energy drinks among its possible sources. Check the caffeine in the whole container and include coffee, tea and other sources in that daily amount; a non-caffeinated drink avoids adding caffeine at lunch.
No. Sainsbury's states its own under-16 sales policy for high-caffeine energy drinks, while the Department of Health and Social Care's England page of 16 July 2026 says it intends to introduce a sales ban. A canteen operator should check the current law for its location and its own venue and supplier policies rather than treating either statement as a rule for every canteen.