A 12 × 150ml case makes sense for a self-serve wedding buffet when you want 12 countable mixer portions, but the number of cases depends on the drinks menu and how many mixed drinks guests are likely to choose. Start with mixers for the spirits being served, add a clearly labelled slimline or non-tonic option where it suits guests, and check the container count as well as the volume before ordering.
Individual 150ml containers make portions easy to count and let guests open a mixer when they make a drink. Fever-Tree’s serving suggestion pairs 150ml of mixer with 50ml of spirit; use that recipe only as a planning example, not as a prediction of what every guest will drink.
Match the tonic selection to the planned spirits. Fever-Tree describes its Premium Indian Tonic as a mixer for gin, vodka and fortified wines, while its Mediterranean Tonic is presented for more specific citrus and herbaceous pairings.
A tonic-led menu can include a distinctly labelled slimline choice. If some drinks call for a mixer other than tonic, consider a separate soda water or ginger ale option rather than expecting one tonic to cover the whole menu.
Plan the drinks first, then count the mixer portions each drink will use and check whether the pack format matches that plan.
| Priority | What to check | Your needs |
|---|---|---|
| Pack size and serves | Check both the container count and volume: 12 × 150ml is 1.8 litres. At 150ml of mixer per drink, one case supplies 12 mixer portions; allow separately for guests who have more than one drink or choose something else. | I want to count portions for the drinks menu, rather than treat one case as enough for 12 guests. Fever-Tree’s published serving suggestion uses 150ml of mixer with 50ml of spirit. |
| Drinks menu | Match tonic to the spirits being offered. Check whether any planned drinks instead call for soda water or ginger ale; those are different mixers, not equivalent tonic flavours. | If we are serving gin and vodka drinks, I want a tonic option. For drinks made with soda or ginger ale, I need to plan those mixers separately. |
| Slimline choice | Check the exact product label, ingredients and case count. Tesco and Sainsbury’s list Schweppes Slimline Tonic Water in a 12 × 150ml format; do not assume another light tonic comes in the same pack size. | I would like guests to be able to identify a slimline tonic without confusing it with regular tonic. |
| Flavoured mixers | Check the intended spirit pairing and the container size before adding a botanical or fruit-flavoured mixer. Fentimans describes a 200ml range, while Sainsbury’s lists Fever-Tree Mediterranean Tonic in a 500ml bottle. | A distinctive flavour is useful only if it fits a drink we are actually serving; it need not replace the more familiar mixers on the buffet. |
| Labels and storage | Keep ingredient information accessible and follow each product’s storage instructions, particularly after opening. If a caterer supplies the drinks, confirm how it will provide allergen information. | Guests should be able to check what is in a mixer, and opened bottles should be handled according to their own labels. |
Pack counts differ even within the tonic category: Tesco lists Schweppes tonic in 12 × 150ml, alongside Fever-Tree tonic formats of 8 × 150ml and 15 × 150ml.
Check the number and size of the containers, then calculate portions from the serving size you intend to use.
A strongly flavoured tonic may suit a planned pairing but gives guests a different choice from classic tonic or soda. Fever-Tree describes its Mediterranean Tonic in relation to citrus and herbaceous gins, vodka and vermouth.
Confirm the spirits and non-alcoholic drinks first; add a flavoured mixer when there is a drink on the menu for it.
Recipes and storage directions vary between products. For example, the Sainsbury’s listing for Fever-Tree Refreshingly Light Aromatic Tonic says to refrigerate it after opening and consume it within three days.
Keep original labels available and follow the instructions for each mixer. Where a food business supplies the buffet, ask how it will provide the required allergen information.
These range references can help you compare mixer styles and formats; a brand name alone does not establish that a particular product comes in a case of 12.
A tonic range with classic, light and flavour-led options for planned spirit pairings.
A tonic option with standard and Slimline products listed by Tesco and Sainsbury’s in 12 × 150ml packs.
A 200ml mixer range that Fentimans says includes tonic flavours, soda water, ginger ale and rose lemonade.
Britvic describes a drinks range that includes mixers, juices and cordials.
A grocery range useful for comparing listed tonic formats with other mixer sizes.
A grocery range listing branded 12-packs alongside larger own-label tonic and soda bottles.
These 12 × 150ml options cover standard tonic, Slimline tonic and ginger ale for a wedding buffet. Choose between them according to the drinks you plan to serve rather than treating the three mixers as interchangeable.
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A separately labelled tonic choice for a self-serve buffet. The pack contains twelve 150ml portions; check the label for ingredients, including aspartame and the phenylalanine statement, when planning for guests’ dietary needs.
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A non-tonic mixer option for drinks that call for ginger ale. The pack contains twelve 150ml cans; use the packaging label if calorie information matters to your choice.
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A standard tonic option for a menu including gin or vodka mixed drinks. The pack contains twelve 150ml portions; its quinine-containing tonic recipe is distinct from a non-tonic mixer such as ginger ale or soda water.
It supplies twelve 150ml mixer portions, or 1.8 litres in total. Fever-Tree’s published recipe pairs 150ml of mixer with 50ml of spirit, so one case covers around 12 drinks made to that recipe; plan the number of cases around the drinks being offered and expected servings, not guest count alone.
Not for every buffet. If tonic features in the drinks menu and you want to offer a distinct Slimline choice, Tesco and Sainsbury’s list standard and Slimline Schweppes tonic in 12 × 150ml packs; keep their labels clear so guests can tell them apart.
It can cover a menu deliberately limited to tonic-based drinks, but it will not make drinks that call for soda water or ginger ale. Check each planned drink before deciding whether to add a non-tonic mixer.
Follow the directions on the specific bottle. For example, Sainsbury’s listing for Fever-Tree Refreshingly Light Aromatic Tonic says to avoid direct sunlight, refrigerate after opening and consume within three days; do not apply that timeframe to every mixer without checking its label.
Where a caterer or another food business supplies the drinks, GOV.UK’s August 2026 guidance says food business operators must provide consumers with allergen information for prepacked and non-prepacked food and drink and follow applicable labelling rules. Confirm the arrangements with the supplier; that food-business requirement should not automatically be treated as a duty on a private, self-hosted wedding.