Office workers looking for a zero-sugar fizzy drink
If tonic flavour is optional, Fentimans lists 0g sugar and 0kcal per 100ml for its Soda Water. If you want tonic bitterness instead, check a no-sugar slimline tonic and its sweeteners.
Who these mixers suit
The useful distinction is whether your lunch drink needs to be sugar-free, retain tonic flavour or come in an individual portion.
Tonic drinkers reducing calories
A light tonic may retain sugar. Fentimans Naturally Light Tonic Water, for example, lists 3.4g sugar and 18kcal per 100ml, so compare the nutrition panel with the amount you plan to drink.
People packing one serving at a time
An individual can may be easier to pack than an opened large bottle. Schweppes Slimline Tonic Water is offered as a 12 × 150ml pack; check that the serving size suits your lunch.
What to check before choosing
Decide whether sugar, tonic flavour or portion format matters most, then compare labels on the same per-100ml basis.
Plain soda water
Choose it when: you want a carbonated drink without sugar or calories and do not need tonic flavour; Fentimans lists 0g sugar and 0kcal per 100ml for its Soda Water.
Trade-off: plain soda water will not provide the quinine bitterness of a tonic.
No-sugar slimline tonic
Choose it when: you want tonic bitterness without sugar; Tesco describes Schweppes Slimline Tonic Water as a no-sugar drink with quinine.
Trade-off: check the sweetener on your pack. Joybuy lists aspartame for the Schweppes 12 × 150ml pack.
Light tonic
Choose it when: you want a tonic and reduced calories are sufficient without requiring zero sugar.
Trade-off: Fentimans Naturally Light Tonic Water lists 3.4g sugar per 100ml; a light label alone cannot establish that a drink is sugar-free.
| Priority | What to check | Your needs |
|---|---|---|
| Sugar and energy | Compare sugar and energy per 100ml, then consider your serving size. Fentimans lists 0g sugar and 0kcal per 100ml for Soda Water, versus 3.4g sugar and 18kcal per 100ml for Naturally Light Tonic Water. | I want to know whether my lunch drink has no sugar or simply fewer calories than another recipe. |
| Flavour | Choose between plain soda water and a tonic with quinine; check the exact product if you want a different flavoured mixer. | Tonic bitterness matters to me, so plain soda water may not be the drink I want. |
| Ingredients | Read the ingredients as well as the nutrition panel. Joybuy lists aspartame for Schweppes Slimline Tonic Water 12 × 150ml; Fever-Tree lists fructose for its Refreshingly Light Indian Tonic. | I want to check which sweetener or sugar ingredient is in the drink before putting it in my lunch bag. |
| Portion format | Compare the volume of an individual can or bottle with the amount you intend to drink. Schweppes Slimline is offered in 150ml cans; consider how you would store any leftover drink from a larger bottle. | A sealed serving is convenient when I cannot keep an opened bottle at work. |
Common buying mistakes
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Assuming “light” means sugar-free
A reduced-calorie tonic can still contain sugar. Fentimans Naturally Light Tonic Water lists 3.4g sugar per 100ml, while Fever-Tree lists fructose in its Refreshingly Light Indian Tonic.
If avoiding sugar is the deciding factor, check the sugar figure per 100ml on the exact pack rather than relying on “light” in the name.
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Choosing a large bottle for one lunch
A larger bottle leaves you with a drink to store after opening if you only want one serving.
Compare individual portions with your planned serving, especially if you cannot refrigerate leftovers at work.
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Overlooking sweeteners in no-sugar tonic
Joybuy lists aspartame and notes a source of phenylalanine for Schweppes Slimline Tonic Water 12 × 150ml.
Read the exact pack’s ingredient information if you need to avoid aspartame or have a phenylalanine-related dietary requirement.
Brand and product-line references
Compare individual recipes rather than assuming every drink from a brand has the same sugar content.
Fever-Tree
Its Refreshingly Light range includes Indian and Mediterranean tonic variants.
- Fever-Tree says its Refreshingly Light Indian Tonic has 50% fewer calories than its regular Premium Indian Tonic.
- The Refreshingly Light Indian Tonic ingredient list includes fructose; check its sugar figure rather than treating the calorie comparison as a sugar-free claim.
Schweppes
Slimline Tonic Water offers a tonic route in formats including 150ml cans.
- Tesco describes its 1L Slimline Tonic Water listing as no sugar and containing quinine.
- Joybuy lists aspartame for the 12 × 150ml pack; check the ingredients if that affects your choice.
Fentimans
Naturally Light Tonic Water and Soda Water serve different packed-lunch preferences.
- Fentimans lists 0g sugar and 0kcal per 100ml for its plain Soda Water.
- Its Naturally Light Tonic Water is not a zero-sugar alternative: Fentimans lists 3.4g sugar and 18kcal per 100ml.
Tesco
Tesco’s low-calorie mixer listings include own-label Indian tonic and flavoured soda-water options.
- The listed own-label options give shoppers other recipes and pack sizes to compare.
- Check the nutrition and ingredients of the particular product rather than applying one listing’s details to the whole range.
Britvic
Britvic is a drinks producer, not a single mixer recipe to compare with a can of tonic or soda water.
- Britvic’s 2016 London Essence announcement described mixers with under 20kcal and less than 4g sugar per 100ml.
- Those historical figures do not establish the formulation of a current pack; compare its own nutrition declaration.
Joybuy mixer options
These portioned mixer options include a slimline tonic, light tonics and a ginger ale. Choose by the flavour and ingredients you want, and check the exact pack’s sugar and energy figures if those determine your purchase.
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Schweppes Slimline Tonic Water 12 × 150ml
The 150ml cans provide individual tonic servings for a packed lunch. Joybuy lists quinine and aspartame in this pack’s ingredients and notes a source of phenylalanine; check the label if either ingredient affects your choice.
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Fever-Tree Refreshingly Light Mediterranean Tonic Water 8 × 150ml
This Mediterranean tonic comes in 150ml cans for individual servings. If sugar is your deciding factor, check this variant’s nutrition panel: “Refreshingly Light” is not itself a sugar-free declaration.
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Fever-Tree Naturally Light Tonic Water 8 × 150ml
The 150ml cans suit a single packed-lunch serving when you want tonic rather than plain soda water. Compare this product’s sugar and energy figures with other tonics before choosing it for a diet-related goal.
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Fever-Tree Refreshingly Light Ginger Ale 8 × 150ml
This is a ginger ale rather than a tonic, in 150ml cans for individual servings. Check the exact pack’s sugar and energy figures if you are comparing it with slimline tonic or soda water.
Questions about diet mixers
Does “light” mean a mixer is sugar-free?
No. Fentimans Naturally Light Tonic Water lists 3.4g sugar per 100ml, while Fever-Tree describes its Refreshingly Light Indian Tonic as having 50% fewer calories than its regular version but lists fructose among the ingredients. Check sugar per 100ml on the exact pack.
How can I compare different can and bottle sizes?
Start with the energy and sugar figures per 100ml, then consider how much you will actually drink. This keeps the comparison on the same basis before you choose a portion size for lunch.
Is an individual can useful for an office packed lunch?
It can be useful when you want one sealed serving rather than an opened bottle to store. Schweppes Slimline Tonic Water comes in 150ml cans; check whether that volume matches your planned drink.
Does no-sugar tonic necessarily contain no sweeteners?
No. Joybuy lists aspartame for Schweppes Slimline Tonic Water 12 × 150ml. If a particular sweetener matters to you, read the ingredients on the exact pack as well as its sugar declaration.