For summer holiday drinks, choose a sugar-free slimline tonic if avoiding sugar matters most but you still want tonic flavour; check its ingredients if you also avoid sweeteners. A tonic labelled ‘light’ may still contain sugar, while soda water gives you an unsweetened serve without tonic’s characteristic bitterness. Match the can or bottle size to how many drinks you expect to make.
The useful starting point is whether your holiday drinks need tonic flavour, less sugar or a particular serving format.
If you are stocking several kinds of drink, distinguish a sugar-free mixer from one that is simply described as light. The NHS suggests sugar-free, diet or no-added-sugar drinks as alternatives to sugary fizzy drinks; the nutrition panel tells you what is in the particular mixer you are buying.
A lighter tonic need not taste like plain soda water. Fever-Tree describes quinine and bitter-orange oils in its Refreshingly Light Indian Tonic, while Fentimans presents its Naturally Light Tonic as a botanical option. Check whether those flavours suit the spirit or alcohol-free drink you plan to serve.
For a holiday gathering, decide whether individual cans or a larger bottle better matches the number and size of serves. Check the total volume in a multipack rather than comparing packs by can count alone.
Start with sugars and ingredients, then choose the flavour and pack format for the drinks you intend to make.
| Priority | What to check | Your needs |
|---|---|---|
| Sugar and calories | Compare sugars and energy per 100 ml on the same basis. Read ‘light’ alongside the figures: Fentimans lists 3.4 g sugar and 18 kcal per 100 ml for Naturally Light Tonic. | I want to know whether I am avoiding sugar or choosing a tonic with fewer calories than another product; those are different decisions. |
| Sweeteners | Read the full ingredient list, not only a ‘slimline’ or ‘no sugar’ description. Joybuy lists aspartame in Schweppes Slimline Tonic Water 12 × 150 ml. | A sugar-free tonic might suit my drink, but I also want to check which sweeteners it contains. |
| Flavour | Decide whether you want quinine-led tonic, a botanical tonic or plain soda water. Fentimans lists 0 g sugar per 100 ml for its Soda Water, which is a different drink from its Naturally Light Tonic. | For a gin and tonic, I may want tonic bitterness; for a drier serve, I would choose soda water deliberately rather than expect the same flavour. |
| Pack format | Check the volume of each can or bottle and the total volume in a multipack. Match it to the number of serves and whether you expect to use an opened bottle promptly. | Individual cans may suit a few separate drinks; a larger bottle may be easier when I am making repeated serves for a group. |
A lower-calorie tonic can still contain sugar. Fentimans lists 3.4 g sugar per 100 ml for Naturally Light Tonic, whereas Tesco describes Schweppes Slimline Tonic Water as having no sugar.
For sugar avoidance, compare sugars per 100 ml and the ingredients. If calories are your concern, compare energy per 100 ml separately.
No sugar does not mean no sweeteners. Joybuy lists aspartame among the ingredients of Schweppes Slimline Tonic Water 12 × 150 ml.
Read the current pack’s full ingredient list if a particular sweetener matters to you.
Soda water offers a different sweetness and flavour profile from a quinine-flavoured tonic, so it changes the finished drink.
Choose soda for an intentionally dry serve. If tonic character matters, check a sugar-free tonic instead.
These examples illustrate different formulations and formats; a brand name alone does not tell you the sugar content of every product in its range.
Fever-Tree lists Refreshingly Light versions of several tonics, including Indian, Mediterranean and Elderflower.
Slimline Tonic Water is a conventional tonic-style option for shoppers checking sugar content.
Fentimans offers both Naturally Light Tonic Water and a separate Soda Water for a different kind of serve.
Britvic announced classic and zero-sugar Indian Tonic Water in 330 ml cans for grocery retail in September 2023.
Tesco’s own-label listings include Low Calorie Indian Tonic Water and a lemon-flavoured low-calorie variant in 1 litre bottles.
These options include a slimline tonic, two Refreshingly Light tonics and a lemon-and-lime soft drink that can be used as a mixer. The lemon-and-lime option is not a tonic substitute if quinine flavour is what you want.
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For individual tonic-style serves when avoiding sugar is the priority. Joybuy lists aspartame in this pack’s ingredients, so check the label if that sweetener matters to you.
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The 15 small cans suit portioned tonic serves at a gathering. Fever-Tree describes quinine and bitter-orange oils in this Indian tonic; check sugars on the pack rather than treating ‘Refreshingly Light’ as a sugar-free claim.
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An eight-can option if you want to try a Mediterranean-style tonic in individual serves. Compare its nutrition panel with the Indian variant if sugar content affects your choice; the two flavours should not be treated as interchangeable.
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A 24-can lemon-and-lime option for group drinks where tonic flavour is not needed. Check its ingredient list if you avoid particular sweeteners, and choose it for its citrus profile rather than expecting a quinine-flavoured mixer.
No. Fentimans lists 3.4 g sugar per 100 ml for Naturally Light Tonic. Check sugars per 100 ml and the ingredients on the product you plan to buy rather than relying on ‘light’ in its name.
Yes, if you want an unsweetened, drier drink rather than tonic flavour. Fentimans lists 0 g sugar and 0 kcal per 100 ml for its Soda Water, but soda water does not provide tonic’s quinine-led bitterness or sweetness.
Check the ingredients, nutrition information, volume and best-before date, along with allergen information where applicable. UK government food-labelling guidance identifies these as information to look for on pre-packed food and drink; checking the current pack also helps you confirm the variant you are taking.