Who these mixers suit

The useful distinction is whether sugar content, sweetener choice or tonic flavour matters most for the drinks you plan to make.

TV-night mixer shoppers watching sugar

If you’re making a gin, vodka or alcohol-free long drink, compare the sugars figure on the exact tonic rather than choosing by a ‘light’ description alone.

Shoppers checking sweeteners

Ingredient lists distinguish aspartame from alternatives such as sucralose and acesulfame K. Aspartame is particularly important to identify for people with phenylketonuria (PKU), as the NHS says it is not suitable for them.

Flavour-first tonic drinkers

If botanical or citrus notes are the priority, a light tonic may appeal, but it may still contain added sugar. Check the ingredients and sugars per 100 ml before settling on a flavour.

What to check when choosing

Start with the sugar figure and ingredient list, then choose the flavour and pack format that fit your TV-night drinks.

Priority What to check Your needs
Sugar and label wording Compare ‘of which sugars’ per 100 ml, then read the ingredients and the exact claim. Tesco Groceries lists Schweppes Slimline 1L at 0 g sugars per 100 ml; Sainsbury’s lists its Diet Indian Tonic 1L at less than 0.5 g; Fentimans lists Naturally Light at 3.4 g and includes sugar. I want to know how much sugar is in my mixer, not assume that ‘diet’, ‘light’, ‘no sugar’ and ‘no added sugar’ mean the same thing.
Sweeteners Read the sweetener names in the ingredients. Tesco Groceries lists aspartame in Schweppes Slimline 1L; Sainsbury’s lists acesulfame K and sucralose in its Diet Indian Tonic 1L. The NHS says aspartame is not suitable for people with PKU. Sweetener type matters to me, so I’ll check the exact pack rather than choose on its sugar figure alone.
Tonic flavour Decide between a plain tonic, a flavoured diet tonic and a botanical light tonic. Sainsbury’s lime diet variant contains lime juice from concentrate and lists less than 0.5 g sugars per 100 ml; Fentimans Naturally Light contains sugar. For my TV-night drink, I may prefer a lime or botanical flavour, provided its ingredients still fit my sugar preference.
Pack and availability Check the pack size against the number of serves you expect to make. The Schweppes Slimline and Sainsbury’s Diet Indian Tonic examples listed by Tesco Groceries and Sainsbury’s are 1L bottles; confirm availability for the exact product before ordering. A bottle may suit several drinks, while smaller portions may suit a different plan. I need the chosen pack to be available for the night.

Buying pitfalls

  • Treating ‘light’ as another way to say ‘no added sugar’

    The terms do not describe an identical formulation. Fentimans lists sugar among the ingredients of Naturally Light and 3.4 g sugars per 100 ml, whereas Tesco Groceries lists 0 g sugars per 100 ml for Schweppes Slimline 1L.

    Compare sugars on the same per-100 ml basis, then read the ingredients and the precise claim on each pack.

  • Choosing by sugar content without reading the sweeteners

    Two lower-sugar tonics can use different sweeteners. Tesco Groceries lists aspartame in Schweppes Slimline 1L, while Sainsbury’s lists acesulfame K and sucralose in its Diet Indian Tonic 1L. The NHS says aspartame is not suitable for people with PKU.

    Check the ingredients and any phenylalanine warning on the exact pack if sweetener type affects your choice.

  • Planning around a listing without checking availability

    A product name can match the wording you want without settling whether you can buy it for a particular evening. Tesco Groceries marked its Sunsip No Added Sugar Tonic Water listing as out of stock.

    Check current availability and the live pack information before relying on a particular mixer for your TV night.

  • Assuming zero sugar removes every dental consideration

    The NHS notes that the acidity of carbonated drinks can contribute to dental erosion; a lower sugar figure does not remove that consideration.

    Use the sugar figure to compare sugar content, rather than treating it as a measure of every aspect of the drink.

Relevant mixer brands

Brand ranges contain different formulations, so use these examples to identify products worth checking rather than assuming every tonic from a brand has the same sugar content.

Schweppes

Slimline Tonic Water is a plain tonic option for shoppers comparing low sugar figures.

  • Tesco Groceries lists the 1L Slimline Tonic Water at 0 g sugars and 2 kcal per 100 ml.
  • The listed ingredients include aspartame. The NHS says aspartame is not suitable for people with PKU.

Sainsbury’s

Its own-label Diet Indian Tonic Water comes in plain and lime 1L variants.

  • Sainsbury’s lists less than 0.5 g sugars per 100 ml for both variants; its plain tonic lists 2 kcal per 100 ml.
  • The plain tonic contains acesulfame K and sucralose and is described as low calorie with sweeteners, rather than by an explicit no-added-sugar claim.

Tesco

Tesco Groceries lists own-label low-calorie tonic alongside other tonic brands.

  • Its tonic listings include Tesco Low Calorie Indian Tonic Water and Schweppes Slimline.
  • The Sunsip No Added Sugar Tonic Water listing was marked out of stock. Check its current availability and pack details before choosing it.

Fentimans

Naturally Light Tonic Water is a botanical-flavoured option when avoiding added sugar is not the deciding condition.

  • Fentimans describes Naturally Light as a lower-calorie alternative to its Premium Indian Tonic Water.
  • Its ingredients include sugar, and Fentimans lists 3.4 g sugars per 100 ml.

Fever-Tree

Its UK Refreshingly Light tonic range offers several flavour variants.

  • Fever-Tree lists Refreshingly Light versions including Indian, Mediterranean, Cucumber and Elderflower tonic.
  • ‘Refreshingly Light’ alone does not establish a no-added-sugar claim. Check the ingredients and nutrition panel of the exact variant; Fever-Tree lists sugar and fructose in its regular Elderflower Tonic Water.

Britvic / London Essence Co.

Britvic describes London Essence as a tonic and mixer range.

  • The range gives shoppers another tonic or soda format to consider for mixed drinks.
  • Check the exact London Essence product’s claim, ingredients and nutrition panel before choosing it for a no-added-sugar requirement.

Joybuy tonic option

This 12 × 150 ml slimline tonic pack is an option for individual TV-night serves. If a no-added-sugar claim is essential, check the wording and nutrition panel on this exact pack.

Schweppes Slimline Tonic Water, 12 × 150 ml cans

Schweppes Slimline Tonic Water 12 × 150 ml

The 12-can pack gives you separate 150 ml portions for TV-night drinks. Compare the sugar figure and sweeteners on this exact pack if those determine your choice, and check availability before ordering.

View on Joybuy

Questions about mixer labels

Does ‘no added sugar’ guarantee 0 g sugars?

No. The Food Standards Agency explains that a no-added-sugars claim concerns added sugars; naturally occurring sugars may still be present. Check ‘of which sugars’ per 100 ml on the exact mixer if the total sugar figure matters to you.

Can a light tonic still contain sugar?

Yes. Fentimans lists sugar in Naturally Light Tonic Water’s ingredients and 3.4 g sugars per 100 ml. Read the ingredients and nutrition panel rather than using ‘light’ as a substitute for a no-added-sugar claim.

Which sweetener should I check for if I have PKU?

Check for aspartame: the NHS says it is not suitable for people with phenylketonuria (PKU). Tesco Groceries lists aspartame in Schweppes Slimline Tonic Water 1L; read the ingredients and phenylalanine warning on the exact pack you intend to buy.

What should I check before buying tonic for a TV night?

Compare sugars per 100 ml, the ingredients, pack size and current availability. A flavoured or light tonic may contain sugar, while a product whose name matches your preferred claim still needs to be available when you plan to buy it.