For a first food shop, choose a diet or zero-sugar fizzy drink by the flavour you will want to keep drinking: a familiar cola, lighter-tasting Diet Coke or a non-cola option. Then check the exact pack for caffeine, ingredients and a phenylalanine statement, and choose a pack size you can store and use.
If you want to stock the fridge or cupboard with fizzy drinks, sugar-free and diet varieties offer familiar cola and fruit flavours without choosing a sugary version. The NHS includes these drinks among its suggested swaps for sugary fizzy drinks.
If you want a diet or zero-sugar cola without caffeine, check the variant name. Standard Coca-Cola Zero Sugar and Pepsi Max list caffeine, while caffeine-free versions are labelled separately.
If you are choosing between individual cans and a larger bottle, consider how much storage space you have and whether the pack size fits how you will use it.
Start with the drink style, then read the nutrition and ingredient information for the exact variant before settling on a pack format.
| Priority | What to check | Your needs |
|---|---|---|
| Sugars | Read sugars per 100ml on the nutrition panel. Coca-Cola GB and Pepsi UK list 0g sugars per 100ml for standard Coca-Cola Zero Sugar and Pepsi Max. | I want a fizzy alternative to sugary drinks. The NHS suggests sugar-free, diet or no-added-sugar drinks as swaps for sugary fizzy drinks when cutting down on sugar. |
| Flavour | Choose between cola and non-cola flavours. Coca-Cola describes Diet Coke as lighter-tasting than Coca-Cola Zero Sugar; Sprite Zero is lemon and lime, while Tesco lists Fanta Zero fruit flavours. | A lighter cola might appeal to me more than a familiar cola flavour—or I may want something fruity instead. |
| Caffeine | Check the exact variant and its ingredients. Standard Coca-Cola Zero Sugar, Pepsi Max and Dr Pepper Zero list caffeine; separately labelled caffeine-free versions are different products. | If I am avoiding caffeine, the words ‘diet’ or ‘zero sugar’ alone do not answer that question. |
| Ingredients | Read the sweeteners and any phenylalanine statement on the selected pack. Ingredient lists can differ between brands and variants. | I need to check a particular ingredient, especially if phenylalanine is relevant to me. |
| Pack format | Check the number and size of cans or the bottle volume, then consider storage space and how you will serve the drink. | For my first shop, I want a quantity I can store and realistically use. |
Standard Coca-Cola Zero Sugar and Pepsi Max list caffeine. Choosing by the words ‘diet’ or ‘zero’ could therefore leave you with the wrong variant if you intended to avoid it.
Read the exact product name and ingredients, and look for an explicitly caffeine-free pack.
Sweeteners and caffeine differ between products. Coca-Cola Zero Sugar and Pepsi Max carry a source-of-phenylalanine statement; the Food Standards Agency identifies aspartame as a concern for people with phenylketonuria (PKU).
If PKU or another ingredient restriction is relevant to you, check the ingredients and warnings on the exact flavour and pack.
These ranges illustrate different flavours and variants; a brand name alone does not tell you the caffeine or ingredient details of a particular pack.
Coca-Cola Zero Sugar and Diet Coke provide distinct sugar-free cola flavours, alongside a separately labelled Coca-Cola Zero Sugar caffeine-free variant.
Pepsi Max is a zero-sugar cola, and Tesco also lists a separately named Pepsi Max No Caffeine option.
Sprite Zero offers a lemon-and-lime option when you want a fizzy drink other than cola.
Tesco lists Fanta Zero Orange and Fruit Twist as fruit-flavoured, non-cola options.
Dr Pepper Zero is another non-cola flavour option.
Tesco lists own-label Diet Cola and Xero Cola alongside branded diet and zero-sugar drinks.
These Joybuy options cover cola, a separately labelled caffeine-free cola and a lemon-and-lime alternative in can multipacks. Choose the flavour and variant first, then check that the pack quantity suits your first shop.
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Consider this pack if you prefer Diet Coke's lighter cola flavour and want individual cans for your first shop.
It contains caffeine; check the exact pack for ingredients and a phenylalanine statement.
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This smaller can pack suits a first shop if you want Pepsi-style cola without committing cupboard space to a larger multipack.
Standard Pepsi Max lists caffeine and a source of phenylalanine; check the selected pack.
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Choose the explicitly labelled caffeine-free variant if you want Pepsi Max in individual cans while avoiding caffeine.
Check the pack's ingredient list and any phenylalanine statement before buying.
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This can pack is a cola option if you prefer Coca-Cola Zero Sugar to the lighter-tasting Diet Coke.
Coca-Cola GB lists 0g sugars per 100ml for standard Coca-Cola Zero Sugar. It also lists caffeine and a source of phenylalanine.
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Consider this lemon-and-lime option if you want to stock individual cans but do not want cola flavour.
Check the exact pack's nutrition panel, ingredients and caffeine information against your needs.
Yes, if you want a fizzy alternative while cutting down on sugar. The NHS suggests sugar-free, diet and no-added-sugar drinks among the options to choose instead of sugary fizzy drinks; check the nutrition panel of the drink you select.
No. Standard Coca-Cola Zero Sugar and Pepsi Max list caffeine. If you want to avoid it, select an explicitly labelled caffeine-free variant and check the ingredients on that pack.
Some drinks containing aspartame carry a source-of-phenylalanine statement. The Food Standards Agency identifies aspartame as a possible risk for people with phenylketonuria (PKU), so check the exact drink's ingredients and warning if PKU is relevant to you.
Compare sugars and energy per 100ml, then check the ingredients, caffeine status and any phenylalanine statement. Where a front-of-pack traffic-light label is provided, GOV.UK explains that it displays energy and indicates whether sugars, salt, fat and saturates are high, medium or low.