For lunch on the go, compare the sugar value and ingredients on the exact can or bottle rather than treating “diet”, “zero” and “no added sugar” as identical. Coca-Cola Zero Sugar and Pepsi MAX list 0g sugars per 100ml in their UK product information, while Tesco Diet Cola is labelled “no added sugar” and lists less than 0.1g sugars per 100ml. If you also want to avoid caffeine, choose an explicitly caffeine-free variant; for a one-off lunch purchase, check that the pack is sold individually rather than only as a multipack.
If sugar content drives your choice, read the “of which sugars” line on the pack you intend to buy. The Coca-Cola Company lists 10.6g sugars per 100ml for Coca-Cola Original Taste and 0g per 100ml for Coca-Cola Zero Sugar; PepsiCo lists 0g per 100ml for Pepsi MAX.
A no-sugar name does not establish caffeine status. PepsiCo lists caffeine in standard Pepsi MAX and separately identifies Pepsi MAX No Caffeine as a no-caffeine variant, so check the wording on the particular can or bottle.
Own-label bottles offer another route if you are buying for later use as well as lunch. Tesco lists its no-added-sugar Diet Cola in a 2-litre bottle; check the pack format before relying on it for a drink to carry with one meal.
Start with the label on the exact variant, then decide whether caffeine status and a pack you can carry matter for this lunch.
| Priority | What to check | Your needs |
|---|---|---|
| Sugar value | Read “of which sugars” per 100ml on the exact pack. The Coca-Cola Company lists 0g for Coca-Cola Zero Sugar; PepsiCo lists 0g for Pepsi MAX. Tesco lists less than 0.1g for its no-added-sugar Diet Cola. | I want to compare the sugar value, not choose from the words “diet” or “zero” alone. |
| Caffeine | Look for explicit caffeine-free wording and check the variant’s ingredients. PepsiCo lists caffeine in standard Pepsi MAX but labels Pepsi MAX No Caffeine separately. | If I am avoiding caffeine at lunch, a no-sugar label by itself is not enough. |
| Ingredients | Read the sweetener list and any phenylalanine statement. The Coca-Cola Company and PepsiCo list different sweetener combinations for Coca-Cola Zero Sugar and Pepsi MAX; both products state that they contain a source of phenylalanine. | A particular sweetener or phenylalanine may affect which label I need to check more closely. |
| Pack format | Check whether the listing is for one drink, a multipack or a large bottle. Tesco lists a 600ml Pepsi MAX No Sugar bottle as a meal-deal drink and its own-label Diet Cola as a 2-litre bottle; confirm current meal-deal eligibility with the retailer. | For one lunch, I want a can or bottle I can carry, rather than assuming a take-home pack is sold separately. |
These words do not tell you that the sugar values or sweeteners are identical. Coca-Cola Zero Sugar and Pepsi MAX list 0g sugars per 100ml, while Tesco’s no-added-sugar Diet Cola lists less than 0.1g per 100ml.
Compare the nutrition panel and ingredients on the exact product you are buying.
The Coca-Cola Company lists caffeine flavouring in Coca-Cola Zero Sugar, and PepsiCo lists caffeine among the flavourings in standard Pepsi MAX. A no-sugar name alone cannot answer the caffeine question.
If avoiding caffeine matters, select a variant expressly labelled caffeine-free and check its pack.
A 2-litre bottle is a different carrying and storage choice from one can or bottle. Tesco’s Diet Cola instructions also say to consume that product within 3 days of opening.
Check the pack size and whether you are buying one drink or a multipack before making a lunch purchase.
Coca-Cola Zero Sugar is a branded zero-sugar option to compare with the exact pack’s ingredient list.
Pepsi MAX has standard and explicitly no-caffeine variants; check which one a listing names.
Tesco Diet Cola is an own-label no-added-sugar option listed in a 2-litre bottle.
Sainsbury's lists a 2-litre own-label Cola Zero in its diet and sugar-free drinks range.
These listings are multipacks of 330ml cans, spanning caffeine-free and standard cola variants. A can can be taken with lunch, but check the purchase format if you need just one drink.
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A caffeine-free variant to consider if you want to take a can with lunch. This listing is for 24 x 330ml cans, not a single-can purchase; check the exact can’s sugar value and ingredients.
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This caffeine-free variant offers 330ml cans for individual lunches, sold here as a 24-pack. Check the exact can’s nutrition and ingredients, particularly if a sweetener or phenylalanine statement matters to you.
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A standard Pepsi MAX option if caffeine is acceptable to you and you want cans to take with lunch. PepsiCo lists 0g sugars per 100ml for Pepsi MAX and caffeine among its flavourings; this listing is for 24 x 330ml cans, so check the pack if you intend to buy only one.
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A multipack of 330ml cans for shoppers who want to take a can with lunch. This is an 18-pack rather than a single drink; check the exact can’s sugar value, caffeine status and ingredients.
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A standard zero-sugar cola option when caffeine is acceptable to you and a 330ml can suits your lunch. The Coca-Cola Company lists 0g sugars per 100ml and caffeine flavouring for Coca-Cola Zero Sugar; this listing is for 18 cans, not a single-can purchase.
No. Read “of which sugars” on the exact pack: the Coca-Cola Company and PepsiCo list 0g per 100ml for Coca-Cola Zero Sugar and Pepsi MAX respectively, while Tesco labels its Diet Cola “no added sugar” and lists less than 0.1g per 100ml.
Not necessarily. The Coca-Cola Company lists caffeine flavouring in Coca-Cola Zero Sugar, and PepsiCo lists caffeine in standard Pepsi MAX. If you are avoiding caffeine, look for an explicitly caffeine-free variant and check that variant’s label.
The Coca-Cola Company and PepsiCo state that Coca-Cola Zero Sugar and Pepsi MAX contain a source of phenylalanine; both list aspartame among their sweeteners. If this ingredient matters to you, read the statement on the exact pack rather than assuming every cola has the same formulation.
A single can or bottle is the more direct format if you need one drink to carry with lunch. Tesco lists its own-label Diet Cola as a 2-litre bottle, while its cola range also lists a 600ml Pepsi MAX No Sugar bottle as a meal-deal drink; check current pack and meal-deal details before buying.
Follow the instructions on the bottle you buy. Tesco says to keep its 2-litre Diet Cola cool and out of sunlight and to consume it within 3 days of opening; that instruction should not be assumed for other products.