If you want tonic flavour with no labelled sugar from the mixer, Schweppes Slimline Tonic Water comes in 150ml cans and lists 0g carbohydrate and 0g sugars per 100ml; it contains aspartame and a source of phenylalanine. Fentimans Soda Water offers a 200ml zero-sugar option if tonic flavour is optional. A light tonic may suit a flavour-led choice, but check its sugar per serving rather than treating “light” as sugar-free.
If you manage diabetes and want tonic in a single serving, the distinction between zero sugar and lower calorie matters. Compare the nutrition panel for the amount you will pour, and check ingredients as well as sugar.
A 150ml or 200ml portion may be more convenient than opening a larger mixer. Check whether the listed units are cans or bottles if the container matters to you.
If you favour an Indian or Mediterranean tonic, compare its labelled sugar with your intended serving size. A flavour preference need not mean choosing a zero-sugar recipe, but “light” alone does not tell you the sugar content.
Choose the flavour and serving format you want, then read the sugar figure for that serving and the ingredient statement.
Consider it: When you want tonic flavour without labelled sugar from the mixer; Schweppes Slimline lists 0g sugars per 100ml in a 150ml can.
Check: It contains aspartame and a source of phenylalanine.
Consider it: When tonic flavour is optional; Fentimans Soda Water lists 0g sugar and carbohydrate per 100ml and comes in a 200ml format.
Trade-off: Soda water will not give the drink tonic’s bitter flavour.
Consider it: When you prefer a particular tonic flavour and are willing to account for the sugar in your serving.
Trade-off: Fever-Tree Refreshingly Light Indian Tonic lists 3.8g sugars per 100ml, while Fentimans Naturally Light Tonic lists 3.4g per 100ml; neither is sugar-free.
| Priority | What to check | Your needs |
|---|---|---|
| Sugar per serving | Read “of which sugars” per 100ml and the unit size. For a 150ml serving, multiply the per-100ml figure by 1.5; for 200ml, multiply it by 2. | I want to know what is in the whole mixer serving, not just 100ml. For example, Sainsbury’s lists 3.8g sugars per 100ml for Fever-Tree Refreshingly Light Indian Tonic: that is 5.7g in 150ml. |
| Container and portion | Confirm millilitres per unit, pack count and whether the product is described as a can or bottle. A “mini” serving does not necessarily come in a bottle. | A single unit suits the drink I am making, but I may specifically want a bottle rather than a can. |
| Ingredients and flavour | Check sweeteners and ingredient statements alongside the nutrition panel. Decide whether you want tonic flavour or plain soda water. | I might want zero-sugar tonic, but I also need to check the aspartame and phenylalanine statement on Schweppes Slimline. If tonic flavour is optional, I can compare soda water instead. |
| The whole drink | Consider any alcohol separately from the mixer. Diabetes UK says alcohol can interfere with blood sugar levels and increase the likelihood of hypoglycaemia. | Choosing a zero-sugar mixer does not settle my decision about an alcoholic drink; I need to consider the drink as a whole. |
Light tonics can still contain measurable sugar. Sainsbury’s lists 3.8g sugars per 100ml for Fever-Tree Refreshingly Light Indian Tonic, while Fentimans lists 3.4g per 100ml for Naturally Light Tonic.
Compare the “of which sugars” figure and the amount in the unit you plan to use.
Schweppes Slimline Tonic lists 0g sugars per 100ml, but its ingredient information includes aspartame and says it contains a source of phenylalanine.
Read the current ingredient statement if either ingredient is relevant to your choice.
Diabetes UK says alcohol can interfere with blood sugar levels and increase the likelihood of hypoglycaemia. A zero-sugar mixer does not remove that alcohol-related risk.
Consider the alcoholic drink separately, and seek advice from your diabetes team about your individual circumstances if needed.
Schweppes Slimline is supplied as 150ml cans, whereas Fentimans lists 200ml formats for its Soda Water and Naturally Light Tonic.
Check the container type, volume per unit and pack count before ordering.
These examples illustrate differences between specific mixer products, not a judgement about every drink each brand makes.
Slimline Tonic Water offers tonic flavour in a 12 × 150ml can pack.
Its Refreshingly Light tonic range includes 150ml single-serving formats with different flavour profiles.
Its 200ml Soda Water and Naturally Light Tonic offer different choices depending on whether tonic flavour matters.
Britvic described a 200ml Pink Raspberry Tonic format in a March 2022 product announcement.
These Joybuy options are 150ml tonic servings: one slimline tonic labelled with 0g sugars per 100ml and three light tonics whose listed recipes contain sugar. Check the pack format as well as the nutrition panel if you specifically want mini bottles.
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For a single-serving tonic with no labelled sugar from the mixer. The nutrition panel lists 0g carbohydrate and 0g sugars per 100ml; the pack contains twelve 150ml cans. It contains aspartame and a source of phenylalanine.
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For an Indian tonic serving when you are accounting for sugar rather than seeking a zero-sugar mixer. The listed figure is 3.8g sugars per 100ml, or 5.7g in 150ml; ingredients include fructose. Confirm the container type if you need bottles.
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For a Mediterranean-style tonic serving when its sugar content fits your choice. The label lists 4.2g sugars per 100ml, or 6.3g in 150ml, and includes fructose; the pack contains eight 150ml units. Check the container type if it matters.
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Another 150ml tonic option for shoppers comparing labelled sugar across flavours. Its listed figure is 3.8g sugars per 100ml, or 5.7g in 150ml, and the ingredients include fructose; the pack contains eight units. Check whether the units are bottles or cans if that affects your choice.
No. Sainsbury’s lists 3.8g sugars per 100ml for Fever-Tree Refreshingly Light Indian Tonic, and Fentimans lists 3.4g per 100ml for Naturally Light Tonic. Read the “of which sugars” line for the serving you intend to use.
Soda water is a different mixer to consider. Fentimans lists its Soda Water in a 200ml format with 0g carbohydrate and 0g sugar per 100ml, but it will not give a drink tonic’s bitter flavour.
No. Diabetes UK says alcohol can interfere with blood sugar levels and increase the likelihood of hypoglycaemia. Consider the alcoholic drink separately from its mixer and seek advice from your diabetes team about your circumstances if needed.
No. Schweppes Slimline Tonic is supplied as 150ml cans. If you specifically want bottles, confirm the container description for the exact product and pack rather than relying on the term “mini mixer”.
Check the current nutrition panel, ingredients, volume per unit and container type. Schweppes Slimline lists 0g sugars per 100ml, but its label also identifies aspartame and a source of phenylalanine, which may matter to an ingredient-specific choice.