Who is choosing a mixer?

The useful starting point is whether the finished drink must contain no added alcohol, whether sugars matter most, or whether particular sweeteners affect the choice.

Alcohol-free TV-night drinkers

A soft-drink mixer can be served on its own with snacks. If you add a spirit alternative, check that product’s stated alcohol by volume (ABV); the mixer’s label does not describe the finished serve.

Sugar-conscious snack sharers

Compare sugars on the drink label using the amount you expect to pour. A tonic described as light can still contain sugar, while a zero-sugar tonic may contain sweeteners.

Botanical-flavour seekers avoiding artificial sweeteners

A botanical light tonic may suit someone who accepts some sugar but wants to avoid artificial sweeteners. Check both the ingredients and sugars rather than relying on the word ‘light’.

What should you check?

Decide what, if anything, you will add to the mixer. Then compare nutrition, ingredients and pack size for the serve you actually want with your snacks.

Priority What to check Your needs
Alcohol in the serve Read the stated ABV of anything added to the mixer. UK Government guidance uses ‘low alcohol’ for alcohol-substitute drinks at 1.2% ABV or below; it does not apply that descriptor guidance to ordinary soft drinks. I want a fizzy drink without adding a standard spirit, or I want to check an alcohol alternative before mixing it.
Sugars and energy Compare sugars and energy per 100ml, then use the intended serving size. Tesco lists 0g sugars and 2kcal per 100ml for its Low Calorie Indian Tonic Water; an ASDA listing gives 3.8g sugars and 15kcal per 100ml for Fever-Tree Refreshingly Light Premium Indian Tonic Water. When snacks are already part of the evening, I want to know how much sugar the drink adds to my glass.
Sweeteners Read the named ingredients. Tesco lists acesulfame K and sucralose in its low-calorie tonic; Tesco’s listing for Schweppes Slimline names aspartame. ASDA lists fructose and no artificial sweeteners for Fever-Tree Refreshingly Light Premium Indian Tonic Water. Zero sugar matters most to me, or I would rather accept some sugar than choose a tonic with artificial sweeteners.
Flavour Choose between an Indian tonic and a more botanical style by checking the product description and ingredients. Fentimans names lemongrass, kaffir lime leaves and juniper leaves in its Naturally Light Tonic Water. With savoury snacks, I may want a familiar tonic; for another evening, I might prefer a more aromatic drink. I would try the flavour before committing to a large pack.
Pack and storage Compare the volume of a can with what you normally pour. For Tesco Low Calorie Indian Tonic Water, Tesco says to refrigerate the bottle after opening and consume it within three days. For one drink, an individual can is convenient; for several planned serves, I may use an opened bottle within its labelled storage window.

Common buying mistakes

  • Reading ‘light’ as alcohol-free or sugar-free

    ‘Light’ does not tell you what will be in the finished drink. ASDA lists 3.8g sugars per 100ml for Fever-Tree Refreshingly Light Premium Indian Tonic Water, and alcohol added to any mixer changes the serve.

    Check the mixer’s nutrition label and the stated ABV of every drink you plan to add.

  • Buying zero-sugar tonic without reading the ingredients

    Zero-sugar tonics can use different sweeteners: Tesco lists acesulfame K and sucralose in its own-label low-calorie tonic, and aspartame in Schweppes Slimline.

    Read the ingredient list, particularly before buying a multipack for people with different preferences.

  • Opening a large bottle for occasional single serves

    Tesco advises refrigerating its Low Calorie Indian Tonic Water after opening and consuming it within three days. That window may not suit widely spaced TV nights.

    Consider individual cans for occasional pours, or a larger bottle when you expect to use it within the labelled period.

    An unfinished open bottle may mean leftover mixer goes unused.

  • Adding a standard spirit to a planned alcohol-free drink

    A soft-drink mixer does not determine the alcohol content of everything combined with it. Drinkaware notes that the effect of choosing no- or low-alcohol drinks depends on whether they replace regular-strength alcohol rather than being added alongside it.

    Decide whether to serve the mixer on its own or with an alternative, and check the ABV of anything you add.

Brand and retailer references

These references help distinguish mixer styles and label details; a brand name alone does not establish a particular product’s sugars, ingredients or availability.

Fever-Tree

Its Refreshingly Light range includes tonics for shoppers considering a fruit-sugar recipe without artificial sweeteners.

  • ASDA lists 15kcal and 3.8g sugars per 100ml for Refreshingly Light Premium Indian Tonic Water, with fructose among its ingredients.
  • That product is not sugar-free; check the particular flavour and serving size.

Schweppes

Slimline Tonic Water is a named zero-sugar tonic option.

  • Tesco lists 0g sugars and 5kcal per 250ml serving for Schweppes Slimline Tonic Water.
  • The listed ingredients include aspartame, which matters if you avoid that sweetener.

Fentimans

Its mixer range offers botanical flavours, including Naturally Light Tonic Water.

  • Fentimans names lemongrass, kaffir lime leaves and juniper leaves in Naturally Light Tonic Water.
  • Flavour-led products need their own nutrition check: Fentimans lists 4.4g sugars per 100ml for its Ginger Beer.

Britvic

Britvic Tonic Water and The London Essence Company provide different mixer lines to compare by product.

  • Britvic announced a retail multipack-can format for its Indian Tonic Water in 2023.
  • Check the current product label and format rather than treating that launch announcement as a current listing.

Tesco

Its own-label Low Calorie Indian Tonic Water is a 1-litre bottled option.

  • Tesco lists 0g sugars per 100ml for the product.
  • It contains acesulfame K and sucralose; Tesco says to refrigerate it after opening and consume it within three days.

Sainsbury's

A retailer listing can provide details for comparing a named branded mixer; Sainsbury's is not the manufacturer of Fever-Tree tonic.

  • Its listing carries Fever-Tree’s claim that Refreshingly Light Mediterranean Tonic Water has 43% fewer calories than Fever-Tree Premium Indian Tonic Water.
  • That comparison concerns those named products; it does not mean the light tonic is sugar-free.

Joybuy mixer options

These options include individual tonic serves and a fizzy elderflower drink for a TV night. Choose the drink’s ingredients separately from any decision about adding alcohol.

Schweppes Slimline Tonic Water, twelve 150ml cans

Schweppes Slimline Tonic Water, 12 × 150ml

The 150ml cans suit individual pours with snacks. Schweppes Slimline is a zero-sugar tonic option; check the can’s ingredient label if you avoid aspartame, and check the ABV of anything added to it.

View on Joybuy
Fever-Tree Refreshingly Light Premium Indian Tonic Water, fifteen 150ml cans

Fever-Tree Refreshingly Light Premium Indian Tonic Water, 15 × 150ml

An individual-can option if you prefer this light tonic’s ingredient approach and accept some sugar. The Joybuy product information lists fructose, 3.8g sugars and 15kcal per 100ml; it is not sugar-free.

View on Joybuy
Fever-Tree Refreshingly Light Mediterranean Tonic Water, eight 150ml cans

Fever-Tree Refreshingly Light Mediterranean Tonic Water, 8 × 150ml

The eight-can pack offers 150ml portions of Mediterranean tonic for a different flavour choice. Compare the pack’s sugars and ingredients with the Indian tonic rather than assuming the two Refreshingly Light variants have identical recipes.

View on Joybuy
Dalston's Fizzy Elderflower, 330ml can

Dalston's Fizzy Elderflower, 330ml

A fizzy elderflower option when you want a change from tonic. Its 330ml can is a different serving size from the 150ml tonic cans, so compare labels using the amount you intend to drink; any added alcohol changes the finished serve.

View on Joybuy

Questions about mixers and snacks

Does a mixer make the finished drink low in alcohol?

No. Serving a soft-drink mixer on its own differs from adding a spirit or another drink containing alcohol. Check the stated ABV of anything you add; the mixer’s label alone cannot describe the finished serve.

What does ‘low alcohol’ mean on a UK alcohol substitute?

UK Government descriptor guidance says a drink marketed as an alcohol substitute must be 1.2% ABV or below to be described as ‘low alcohol’. The guidance does not apply to ordinary soft beverages, so check the label of the particular drink you plan to mix.

Should I choose zero-sugar tonic or a light tonic made with fruit sugar?

Choose by which ingredient difference matters to you. Tesco lists 0g sugars for its Low Calorie Indian Tonic Water, while ASDA lists 3.8g sugars per 100ml and fructose for Fever-Tree Refreshingly Light Premium Indian Tonic Water. The zero-sugar Tesco product contains sweeteners; the named Fever-Tree product is listed as free from artificial sweeteners but is not sugar-free.

Will a large tonic bottle keep for several TV nights?

Follow that bottle’s storage instructions. Tesco says its Low Calorie Indian Tonic Water should be refrigerated after opening and consumed within three days; individual cans may suit drinks planned further apart.

What if I need to avoid a particular sweetener?

Check the ingredients on the pack you receive. Tesco lists acesulfame K and sucralose for its own-label low-calorie tonic and aspartame for Schweppes Slimline, so ‘zero sugar’ does not identify which sweetener a tonic uses.