Hosts offering different drinks
Keep mixers separate from alcoholic ingredients so guests can choose how their drink is served. Individual cans let you open one portion at a time rather than sharing an opened bottle.
Who is this for?
People choosing tonic by sugar content
Compare the nutrition panel and ingredients: a light tonic can still contain sugar, while a zero-sugar tonic may contain sweeteners. Changing the tonic does not change the alcohol units in an added spirit.
Guests who prefer a distinctive mixer
A botanical or citrus tonic offers a different flavour from classic tonic or soda water. If the drink includes alcohol, its strength still depends on the alcoholic ingredient and the amount poured.
What should you check?
Decide whether the finished drink needs to be alcohol-free before comparing mixers for sugar, flavour and serving format.
| Priority | What to check | Your needs |
|---|---|---|
| Alcohol content | Check the label of a low-alcohol alternative. If adding alcohol, use its ABV and measured volume to work out units; the NHS formula is ABV (%) × volume (ml) ÷ 1,000. | I need an alcohol-free serve, so I’ll offer a suitable mixer without an alcoholic base. For a mixed drink, I’ll decide the alcoholic pour separately. |
| Sugar and sweeteners | Compare sugars and calories on the same per-100ml or per-serving basis, then read the ingredients. Tesco Groceries lists 0g sugars per 250ml for Schweppes Slimline, which contains aspartame; Joybuy lists 3.8g sugars per 100ml for Fever-Tree Refreshingly Light Indian Tonic. | If I want no sugar in the tonic, I’ll check a slimline option’s ingredients. If avoiding a particular sweetener matters more, I’ll compare light tonics without assuming they are sugar-free. |
| Serving format | Match the number and size of cans or bottles to the guests likely to use each mixer. Check storage instructions for anything left after opening. | Separate 150ml cans would let guests choose their own mixer; for a group sharing one drink, a larger bottle may be more practical. |
| Flavour | Choose between neutral soda water, bitter tonic and more distinctive botanical or ginger flavours. Check sugar content independently of flavour. | I’d keep a neutral option alongside a stronger-flavoured mixer if guests have different preferences or are pairing it with different base drinks. |
Common buying mistakes
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Assuming the mixer sets the alcohol level
A light tonic does not remove alcohol from a spirit or other alcoholic base. According to the NHS, units depend on the alcoholic ingredient’s ABV and volume.
For an alcohol-free drink, leave out the alcoholic base. Otherwise, measure it before adding the mixer.
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Reading “light” as “sugar-free”
Joybuy lists 3.8g sugars per 100ml for Fever-Tree Refreshingly Light Indian Tonic, whereas Tesco Groceries lists 0g per 250ml for Schweppes Slimline. The products also differ in their ingredients.
Read both the nutrition panel and ingredients list, particularly if sugar or a specific sweetener affects your choice.
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Opening a large bottle for only a few serves
An opened bottle leaves more mixer to store when guests choose different drinks. Sainsbury’s says to refrigerate its Diet Indian Tonic after opening and use it within 3 days.
Estimate how many guests will share each mixer before choosing between individual cans and a 1-litre bottle.
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Pairing every drink with a strongly flavoured tonic
A botanical or citrus-led tonic changes the flavour of the finished drink, which may not suit every base or guest.
Offer a neutral soda or classic tonic as another option, and try a distinctive flavour before buying a larger pack.
Brand and retailer references
These examples show how tonic formulations and formats differ; a brand mentioned here is not necessarily represented in the Joybuy products below.
Fever-Tree
Its Refreshingly Light Indian Tonic is available in a 15 × 150ml can pack.
- Joybuy lists 15kcal and 3.8g sugars per 100ml for this tonic.
- It contains sugar, so “light” does not mean sugar-free.
Schweppes
Slimline Tonic Water offers a zero-sugar classic-tonic option in bottle and can formats.
- Tesco Groceries lists 0g sugars and 5kcal per 250ml for the 1-litre bottle.
- The listed ingredients include aspartame and quinine.
Fentimans
Its tonic range includes Naturally Light and yuzu-flavoured options.
- Fentimans describes Naturally Light as having 30% fewer calories than its own Premium Indian Tonic Water.
- Fentimans lists 4.9g sugars per 100ml for Oriental Yuzu Tonic; check the particular variant rather than treating the range as sugar-free.
Britvic
Britvic announced classic and zero-sugar Indian Tonic Water in 330ml grocery cans in September 2023.
- The announced variants offer two different sugar choices in the same can size.
- Check the current pack and local listing for the variant and formulation you want.
Tesco
Tesco Groceries lists own-label Indian tonic, low-calorie Indian tonic and soda water alongside branded mixers.
- Its range provides tonic and soda choices to compare by ingredients and format.
- Check the individual product listing before planning around a particular own-label option.
Sainsbury’s
Its own-label Diet Indian Tonic Water is listed in a 1-litre bottle.
- Sainsbury’s lists 4kcal and less than 0.5g sugars per 250ml.
- It contains acesulfame K and sucralose; Sainsbury’s says to refrigerate after opening and use within 3 days.
Joybuy picnic mixer options
These Joybuy options include a drink described as non-alcoholic, portioned tonic waters and a ginger ale. Choose any alcoholic ingredient separately; check the pack when an alcohol-free label is essential.
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Dalston’s Fizzy Elderflower 330ml
Described as non-alcoholic and suitable to drink on its own, this elderflower-flavoured fizzy drink comes in a 330ml can. Its product information lists 14kcal and 3.3g sugars per 100ml, so it is not a sugar-free choice. Adding alcohol would change the finished drink’s alcohol content.
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Schweppes Slimline Tonic Water 12 × 150ml
Twelve individual cans suit separate picnic serves. The product information lists 0g sugars and 2kcal per 100ml, as well as aspartame and a source of phenylalanine. Check the pack if you need confirmation that a serve is alcohol-free; any alcohol added must be accounted for separately.
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Fever-Tree Refreshingly Light Premium Indian Tonic Water 15 × 150ml
The 150ml cans can be opened as individual tonic serves. Joybuy lists 15kcal and 3.8g sugars per 100ml, so this is not a no-sugar tonic. Check the pack for an alcohol-free statement if required, and measure any alcoholic ingredient separately.
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Fever-Tree Refreshingly Light Mediterranean Tonic Water 8 × 150ml
Eight individual cans offer a botanical-flavoured alternative to classic tonic. The product information lists 17kcal and 4.2g sugars per 100ml; it is not sugar-free. Check the pack if an alcohol-free statement matters, and keep any added alcohol separate from the mixer choice.
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Fever-Tree Refreshingly Light Ginger Ale 8 × 150ml
This ginger-flavoured alternative to tonic comes in eight individual cans and is described for mixing or drinking on its own. The product information lists 18kcal and 4.4g sugars per 100ml. Check the pack if serving it as an alcohol-free drink, and account separately for any alcohol you add.
Frequently asked questions
Does a slimline mixer make a mixed drink lower in alcohol?
No: changing the mixer does not change the units in an alcoholic ingredient already poured. The NHS calculates units as ABV (%) × volume (ml) ÷ 1,000, so a 25ml measure of 40% ABV spirit contains 1 unit before the mixer is added.
Does “low alcohol” mean alcohol-free?
No. UK Department of Health and Social Care guidance published in 2018 describes low-alcohol drinks as those at 1.2% ABV or below. Check the specific drink’s ABV rather than treating the descriptor as an alcohol-free statement.
Should I bring cans or a large bottle to a picnic?
Choose individual cans if guests want separate mixers or only a few servings of each; choose a larger bottle when the group is likely to use it promptly. For its 1-litre Diet Indian Tonic, Sainsbury’s advises refrigeration after opening and use within 3 days.
Are diet tonics free from sweeteners?
Not necessarily. Tesco Groceries lists aspartame in Schweppes Slimline, while Sainsbury’s lists acesulfame K and sucralose in its Diet Indian Tonic. Check the ingredients of the particular tonic if you avoid a specific sweetener.
What should I check before serving a mixer to someone with an allergy or dietary restriction?
Check the ingredients and allergen information on the particular pack before serving it, rather than relying on the range name or another flavour’s details. Also confirm any sweetener or alcohol-free requirement against that product’s label.