One-drink-at-a-time shoppers
Individual 150ml cans let you open one portion rather than a larger bottle. Check the total volume in a multipack if you are also ordering for other people.
Who is this choice for?
Shoppers comparing tonic recipes
If sweetness or a particular sweetener matters to you, compare the ingredient lists and nutrition panels of the exact standard and light products. Their labels do not describe one interchangeable recipe.
Shoppers who need a specific mixer
If the flavour, tonic style or pack format is important for a planned drink, decide whether you would accept a substitute before checkout and inspect any replacement offered at delivery.
What should you check before ordering?
Start with the drink you intend to make, then check the pack and recipe against how many servings you need and whether a substitution would work.
| Priority | What to check | Your needs |
|---|---|---|
| Mixer style | Read the exact product name and flavour description. Check whether the listing is for Indian tonic, another tonic style or a different sparkling mixer. | I want the mixer to suit the drink I have planned, rather than accepting a different flavour simply because it is sparkling. |
| Recipe | Compare energy and sugars on the same per-100ml basis. Read the ingredient list for the sweeteners and quinine in the particular product. | A light or diet label alone does not tell me which sweetener is used. For example, Ocado lists 36 kcal and 8.0g sugars per 100ml for Fever-Tree Premium Indian Tonic, against 15 kcal and 3.8g for its Refreshingly Light Indian Tonic. |
| Pack format | Compare the number and volume of cans with the total bottle volume. For a bottle, read that product’s own instructions for storage after opening. | Individual cans suit me when I make one drink at a time; a larger bottle is more practical when I expect to use it for several drinks promptly. |
| Substitutions | Check the retailer’s substitution setting and inspect any proposed replacement for its style, ingredients and pack format. | I would rather decline a replacement that changes an important part of my order. Which? reported in March 2026 that 20% of online grocery shoppers in its November 2025 survey had received a substitution in their most recent shop; its online survey involved 3,552 members of the public. That measures substitutions, not mixer preferences. |
| Delivered label | Check the ingredients, allergen information, net quantity, date marking and storage directions on the item delivered, particularly if it is a substitute. | Before using the mixer, I want to confirm that the delivered recipe and pack match what I intended to order. |
Ordering mistakes to avoid
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Treating every tonic substitute as equivalent
A replacement can change the flavour, sweetener or pack format you chose. Tesco and Sainsbury’s both say they may offer substitutes for unavailable groceries when substitutions are allowed.
Turn substitutions off where the retailer offers that choice and you need the exact item. Otherwise, inspect the replacement before accepting it; both retailers describe ways to refuse an unwanted substitute at delivery.
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Comparing pack counts without checking volume
A multipack of small cans and a single bottle serve different plans, even when both are labelled as tonic water. Counting containers alone will not tell you how much mixer you are ordering.
Check the volume of each can or bottle and the total pack volume against the number of drinks you intend to make.
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Assuming light, diet and no added sugar mean the same recipe
The Ocado listings for Fever-Tree standard and Refreshingly Light Indian Tonic show different energy and sugars per 100ml. Its M&S Diet Indian Tonic listing identifies sucralose, so the front-of-pack descriptions should not be treated as ingredient lists.
Read the nutrition panel and ingredients for the exact item you order, and repeat the check if it is substituted.
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Opening a large bottle without a plan to finish it
After-opening directions vary by product. The M&S Diet Indian Tonic listing on Ocado, for example, says to refrigerate it after opening and consume it within three days; that period should not be applied to other tonics.
Choose a pack that fits the drinks you expect to make, and follow the directions on the bottle delivered.
Brand and retailer references
These product-line examples and grocery policies help with label and delivery checks; they do not describe every product from a brand or every order at a retailer.
Fever-Tree
Ocado lists Premium Indian Tonic and Refreshingly Light Indian Tonic in cans.
- The listed products give a direct per-100ml comparison: 36 kcal and 8.0g sugars for Premium Indian Tonic, versus 15 kcal and 3.8g sugars for Refreshingly Light.
- Check the exact variant and pack size; those figures do not describe every Fever-Tree mixer.
Schweppes
Ocado lists a 1L tonic bottle and a separate Slimline Tonic product.
- The listed 1L tonic provides a bottle-format option for several drinks and declares 21 kcal and 4.9g sugars per 100ml.
- Check storage instructions on the bottle you select rather than borrowing them from another Schweppes variant.
Fentimans
Ocado lists Fentimans Naturally Light Tonic Water as a botanically brewed, citrus-flavoured tonic.
- Its listing describes a citrus-led option for shoppers considering a flavoured tonic.
- Check the selected product’s nutrition panel and pack format rather than assuming that every light tonic has the same recipe.
Britvic
Ocado lists Britvic Indian Tonic Water and a separate Low Calorie Tonic Water pack.
- The listed low-calorie product is a 24 × 150ml pack, a format to consider when ordering individual cans for several drinks.
- Check the exact product description and ingredients when choosing between the two tonic styles.
Tesco
Tesco’s grocery delivery guidance is relevant when an exact mixer matters to your order.
- Tesco says it may offer an alternative when substitutions are allowed and an item is unavailable.
- Check your substitution setting; Tesco says an unwanted substitute can be handed back to the driver or Click+Collect colleague for a refund.
Sainsbury’s
Sainsbury’s substitution guidance matters if a particular mixer recipe or format is required.
- Sainsbury’s says it identifies substitutions after picking and on delivery paperwork.
- Check the proposed item against your order; Sainsbury’s says an unwanted substitute can be refused to the driver for a refund.
Joybuy tonic options
These Joybuy options are canned tonic mixers for shoppers comparing individual portions, Indian tonic recipes and a Mediterranean-style variant. Check the selected pack and ingredients against your planned drink.
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Fever-Tree Refreshingly Light Premium Indian Tonic Water, 15 × 150ml
Individual 150ml cans suit one-drink portions. Compare this Refreshingly Light Indian tonic with the exact standard tonic recipe if sweetness or ingredients affect your choice.
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Schweppes Slimline Tonic Water, 12 × 150ml
This 12-can pack offers individual tonic portions. If you are choosing it for a particular sweetener or nutrition profile, check the exact pack label rather than relying on the word “Slimline”.
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Fever-Tree Refreshingly Light Mediterranean Tonic Water, 8 × 150ml
Choose this 8-can pack when you want to consider a Mediterranean tonic rather than an Indian tonic for individual drinks. Check its flavour description and ingredients against the drink you intend to make.
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Fever-Tree Naturally Light Tonic Water, 8 × 150ml
The 8 × 150ml format suits portioned use. Compare the nutrition panel and ingredient list of this Naturally Light variant with those of any other tonic you are considering.
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Fever-Tree Indian Tonic Water, 8 × 150ml
This Indian tonic comes in eight individual 150ml cans. Consider it when you want that tonic style in portions, and compare its exact recipe with a light variant if sweetness matters to you.
Questions about ordering sparkling mixers
Should I order tonic cans or a large bottle?
Choose cans when you usually make one drink at a time; consider a larger bottle when you plan several drinks soon after opening. Check the bottle’s own storage directions: Ocado’s M&S Diet Indian Tonic listing, for example, says to refrigerate after opening and consume within three days, but that instruction is specific to that product.
Do light and standard tonics have the same ingredients?
Not necessarily. Ocado’s Fever-Tree Premium and Refreshingly Light Indian Tonic listings show different energy and sugars per 100ml, while its M&S Diet Indian Tonic listing identifies sucralose. Read the ingredients and nutrition panel of the exact tonic you intend to order.
What if Tesco substitutes my mixer?
Tesco says it may offer an alternative when you have allowed substitutions. If the replacement does not suit your drink, Tesco says you can give it back to the driver or Click+Collect colleague for a refund.
Can I refuse a Sainsbury’s mixer substitution?
Yes. Sainsbury’s says it may offer a substitute when an item is unavailable unless you have asked not to receive one. Check the substitution details it sends after picking and on the delivery paperwork; its policy says you can refuse an unwanted item to the driver for a refund.
What should I check on the mixer delivered?
Check that its flavour, pack volume and ingredients match what you need, especially if it is a substitute. Also read its allergen information, date marking and storage directions before use; UK government food-labelling guidance identifies ingredients, allergens, quantity and date marking as information for pre-packed food.