People avoiding caffeine at work
If caffeine matters to your choice, look for an explicit caffeine-free statement. Pepsi UK lists caffeine in standard Pepsi MAX but describes Pepsi MAX No Caffeine as a separate, caffeine-free drink.
Who is this for?
Lunch-packers comparing sugar labels
A cola, lemon-and-lime drink or flavoured sparkling water may fit your flavour preference. Compare total sugars on the nutrition panel rather than treating “no added sugar” and “zero sugar” as interchangeable.
People checking sweeteners for PKU
If you have phenylketonuria (PKU), or are buying for someone who does, check the exact pack for aspartame and its phenylalanine statement. The Food Standards Agency identifies undeclared aspartame as a possible risk for people with PKU.
What should you check?
Start with the label requirements you cannot compromise on, then choose a flavour and pack format that work for your lunch.
| Priority | What to check | Your needs |
|---|---|---|
| Total sugars | Read “of which sugars” per 100ml and per serving. A no-added-sugar claim does not establish 0g total sugars; Tesco lists 0.2g per 100ml for its Apple & Raspberry Sparkling Flavoured Water. | I want to know how much sugar is in the portion I pack, not just whether sugar was added. |
| Caffeine | Check the exact variant for an explicit caffeine-free claim. Pepsi UK lists caffeine in standard Pepsi MAX and describes Pepsi MAX No Caffeine as caffeine-free. | For an afternoon lunch, I may want a cola without caffeine rather than assuming every zero-sugar cola meets that requirement. |
| Sweeteners | Read the current ingredients and any phenylalanine statement. The Food Standards Agency identifies aspartame as a source of phenylalanine relevant to people with PKU. | If I have PKU or am buying for someone who does, the exact sweetener information matters more than the front-of-pack sugar claim. |
| Acidity | Consider when you will drink it, not only its sugar content. Wirral Community Health and Care NHS Foundation Trust says sugar-free and no-added-sugar fizzy drinks can be very acidic and cause tooth wear. | I would rather have a fizzy drink with lunch than sip it at my desk throughout the afternoon. |
| Pack format | Check the individual container size and how many drinks come in the pack. A 24 × 330ml can pack serves a different buying need from one 500ml bottle. | A single container needs to fit my packed lunch; I can decide separately whether a multipack suits regular lunches. |
Common buying mistakes
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Reading “no added sugar” as “zero sugar”
Ingredients such as fruit juice can contribute sugars even when no sugar is added. Tesco lists 0.2g sugars per 100ml for its no-added-sugar Apple & Raspberry Sparkling Flavoured Water.
If 0g sugars is your requirement, check the “of which sugars” figure on the current nutrition panel, including the amount per serving.
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Assuming a zero-sugar cola has no caffeine
Pepsi UK lists caffeine in standard Pepsi MAX, while Pepsi MAX No Caffeine is a separate variant.
Choose a product whose exact name or current label explicitly confirms it is caffeine-free.
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Overlooking the phenylalanine statement
Some zero-sugar drinks list aspartame. The Food Standards Agency identifies aspartame as a source of phenylalanine that is relevant to people with PKU.
If you have PKU or are buying for someone who does, check the ingredients and warning on the exact pack rather than assuming sweeteners are the same across variants.
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Treating sugar-free fizz as a water replacement
Wirral Community Health and Care NHS Foundation Trust says fizzy, diet and no-added-sugar drinks can be very acidic and cause tooth wear.
If you choose a fizzy drink, consider having it with lunch and keeping plain water for drinking at your desk.
Brand and product-line references
Brand names are a starting point; sugar, caffeine and sweeteners can differ between variants.
Coca-Cola
Coca-Cola GB describes Coca-Cola Zero Sugar Caffeine Free as a cola without sugar or caffeine.
- An explicitly named caffeine-free, zero-sugar variant for cola drinkers.
- Check the current ingredients and phenylalanine statement if aspartame is relevant to you.
Pepsi
Pepsi UK distinguishes Pepsi MAX No Caffeine from standard Pepsi MAX, whose listed flavourings include caffeine.
- Pepsi MAX No Caffeine explicitly addresses both sugar and caffeine preferences.
- Do not use the standard and caffeine-free variants interchangeably when checking caffeine.
Sprite
Coca-Cola GB describes Sprite Zero Sugar as a zero-sugar lemon-and-lime fizzy drink.
- A non-cola flavour when the sugar figure is the main label check.
- Check its current sweeteners and phenylalanine statement; do not infer caffeine status from “zero sugar”.
Fanta
Coca-Cola GB includes Fanta in its drinks range.
- For a particular Fanta variant, check its own nutrition panel and ingredients before deciding whether it meets a no-added-sugar requirement.
Dr Pepper
Tesco Groceries lists Dr Pepper Zero in its sugar-free fizzy-drinks category.
- Use the exact pack to check its sugars, caffeine and sweeteners rather than relying on the category name.
Tesco
Tesco Groceries describes its Apple & Raspberry Sparkling Flavoured Water and Sparkling Diet Lemonade as no-added-sugar drinks.
- Fruit-flavoured sparkling water and lemonade offer non-cola choices.
- No added sugar is not the same as 0g total sugars: Tesco lists 0.2g per 100ml for the Apple & Raspberry drink and less than 0.1g per 100ml for the diet lemonade. Check the current label.
Joybuy drinks for a packed lunch
These Joybuy options cover cola, lemon-and-lime and fruit-flavoured drinks in cans or a bottle. If avoiding caffeine is essential, check the exact product label before choosing, particularly for the fruit-flavoured options.
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Diet Coke No Caffeine 24 × 330ml
A cola option named No Caffeine, supplied as 24 individual 330ml cans for packed lunches. Check the current can for its sugars, sweeteners and any phenylalanine statement.
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Pepsi Max Caffeine Free 24 × 330ml
A 24-can cola pack with 330ml portions. The Joybuy product information describes this variant as containing no sugar or caffeine; check the current can for ingredients and any phenylalanine statement.
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7UP Zero 24 × 330ml
A lemon-and-lime alternative to cola in a pack of 24 individual 330ml cans. Check the current can to confirm its sugar and caffeine information and whether its sweeteners meet your needs.
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Woongjin Nature's Marlin Peach Zero PET 500ml
A peach-flavoured option in one 500ml PET bottle rather than a multipack of cans. Check the current label for total sugars and an explicit caffeine statement if either is a firm requirement.
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Tango Apple Sugar-Free 24 × 330ml
An apple-flavoured option in a pack of 24 individual 330ml cans. Check the current nutrition panel for the sugars figure and look for an explicit caffeine statement if avoiding caffeine.
Questions about sugar-free fizzy drinks
Does “no added sugar” mean a fizzy drink contains no sugar?
No. Ingredients such as fruit juice can contribute sugars: Tesco lists 0.2g sugars per 100ml for its no-added-sugar Apple & Raspberry Sparkling Flavoured Water. If you want 0g sugars, check the nutrition panel on the exact drink.
Are all zero-sugar colas caffeine-free?
No. Pepsi UK lists caffeine in standard Pepsi MAX, while Pepsi MAX No Caffeine is a separate caffeine-free variant. Coca-Cola GB also describes Coca-Cola Zero Sugar Caffeine Free as caffeine-free. Check the exact variant rather than relying on its sugar claim.
Why does a drink say it contains a source of phenylalanine?
The statement is relevant to drinks containing aspartame. The Food Standards Agency identifies aspartame as a source of phenylalanine and a possible risk for people with PKU when undeclared. If PKU is relevant to your purchase, check the ingredients and warning on each current pack.
Is a sugar-free fizzy drink suitable for sipping all afternoon?
Its lack of sugar does not remove the acidity concern. Wirral Community Health and Care NHS Foundation Trust says sugar-free and no-added-sugar fizzy drinks can be very acidic and cause tooth wear. Consider having a fizzy drink with lunch and using plain water at your desk.