For one office lunch, choose a small, unopened tonic if its flavour appeals to you; a 1L bottle is more practical when you can refrigerate and use the remainder as directed. If sugar matters, compare the exact product's label per 100ml and the amount you plan to drink rather than treating either “light” or “premium” as a guarantee.
The useful distinction is between a drink for one lunch, a recipe chosen for its flavour or sugar content, and a bottle intended for several servings.
If you want tonic to drink with your packed lunch, start with a small format and a flavour you would enjoy on its own. Fentimans describes juniper berry, kaffir lime leaves and lemongrass in its Premium Indian Tonic; those botanical notes will matter more to this choice than the word “premium” on a label.
Check sugars per 100ml, then consider how much of the container you will drink. Fentimans lists 3.4g sugars per 100ml for its Naturally Light Tonic Water, so “light” should not be read as sugar-free. Check the ingredient list if sweeteners also affect your choice.
An unopened small unit avoids carrying a partly used bottle. If the mixer is intended for an occasion at work that could involve alcohol, check your employer's policy rather than assuming that bringing a mixer makes alcohol use acceptable.
Choose the flavour and amount you actually want to drink, then check whether the container works for your journey and storage arrangements.
| Priority | What to check | Your needs |
|---|---|---|
| Flavour | Read the flavour description for citrus, floral or herbal notes. If drinking tonic on its own, consider whether you enjoy its characteristic bitterness. | I want a flavour that works with my lunch, not a mixer chosen for a spirit pairing I will not use. |
| Sugars and ingredients | Compare sugars per 100ml and the amount in the portion you plan to drink. Check sweeteners on the ingredient list: Fentimans lists 3.4g sugars per 100ml for Naturally Light Tonic Water, while Tesco lists 21g sugars in a 250ml Tesco finest Indian Tonic can. | When sugar is a deciding factor, I want to compare the drinks in the amounts I would actually have at lunch. |
| Portion and packing | Check the volume of each unit, not just the number in a multipack. A small unopened can or bottle avoids carrying the remainder of a large opened bottle. | I need one drink that fits in my lunch bag and stays unopened until my break. |
| Storage after opening | Read the instructions for a larger bottle and confirm that you can follow them. Sainsbury's says its 1L Diet Indian Tonic Water should be refrigerated after opening and used within three days. | If I plan several servings, I need somewhere to keep the opened bottle and a plan to use it in time. |
Premium describes a product's positioning, not its nutrition. Tesco lists 21g sugars in a 250ml can of Tesco finest Indian Tonic.
Compare the nutrition panels per 100ml and for the amount you expect to drink.
A bottle with several servings leaves you with tonic to store after opening. Sainsbury's instructs buyers to refrigerate its opened Diet Indian Tonic Water and use it within three days.
Choose a small unopened unit for one break, or use a larger bottle only when its remaining servings and storage instructions suit your plans.
A light or diet recipe need not be sugar-free and may contain sweeteners. Sainsbury's lists acesulfame K and sucralose in its Diet Indian Tonic Water.
Check both the sugars figure and ingredient list for the exact variant you intend to buy.
A mixer is suitable as a soft drink, but it does not determine whether alcohol is permitted at work.
If you intend to combine it with alcohol on work premises, check your employer's policy first, particularly in a safety-sensitive role.
These examples show how flavour, container size and label information can differ; a brand name alone does not tell you which format suits one lunch.
Its tonic range includes regular, light and flavoured options. Fever-Tree describes its cans as suitable for carrying on the go.
Fentimans describes juniper berry, kaffir lime leaves and lemongrass in its Premium Indian Tonic, and lists 200ml formats for Naturally Light Tonic Water.
The Indian Tonic Water 1L listing at ASDA describes four 250ml glasses and lists 12g sugars per 250ml.
Britvic announced classic and zero-sugar Indian Tonic Water in 330ml cans in 2023.
Tesco lists its Indian Tonic Water in 250ml cans and gives 21g sugars per can.
Sainsbury's Diet Indian Tonic Water is a 1L bottle described as a low-calorie tonic with sweeteners.
These options include small-format light tonics, a slimline tonic and a flavoured 200ml tonic. Compare the exact variant and container details before choosing one for your lunch bag.
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The 150ml unit size may suit one lunch drink. Check the nutrition panel for the amount you plan to drink; “light” does not mean sugar-free.
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Consider this 150ml format if you prefer a Mediterranean tonic to an Indian tonic. Compare its ingredients and sugars per 100ml with the other light variants before choosing.
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The pack names eight 150ml units for smaller portions. Check the can label for the exact light-tonic variant and its nutrition before comparing it with another Fever-Tree recipe.
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This 150ml format is an option if portion size matters more to you than a botanical-style tonic. Read the ingredient list and any label warnings when comparing slimline recipes.
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The pack names 200ml units. Before choosing it for a packed lunch, check that each unit is individually sealed; read the nutrition panel rather than assuming “skinny” means sugar-free.
Choose one when you want its particular flavour and can take an appropriate portion to work. A premium label does not establish a nutritional advantage, so compare the exact drink's ingredients and nutrition if those affect your decision.
Choose by the exact recipe's flavour, sugars and ingredients rather than its front-of-pack name alone. Fentimans Naturally Light Tonic Water, for example, lists 3.4g sugars per 100ml; “light” does not mean sugar-free.
Use the per-100ml figures to compare recipes, then check the sugars in the amount you expect to drink. A 150ml unit and a 250ml can are different portions, even when their labels show the same per-100ml figure.
Yes, if you can follow that product's storage instructions. Sainsbury's says its Diet Indian Tonic Water should be refrigerated once opened and used within three days; check the directions on any other bottle separately.
Do not assume alcohol is permitted because you brought a mixer. Check your employer's alcohol policy before planning to drink alcohol on work premises, particularly if your role involves safety-sensitive work.