Who is a case of 12 for?

Hosts serving gin or vodka mixers

A 12 × 150ml Schweppes tonic case provides twelve individual portions. Sainsbury’s describes the regular tonic as suitable to drink straight or mix with gin or vodka.

Hosts offering a lower-calorie option

Sainsbury’s lists Schweppes Slimline Tonic Water in the same 12 × 150ml format and describes it as low-calorie. Check the current label if guests have ingredient preferences.

Hosts choosing by tonic flavour

Fever-Tree and Fentimans describe botanical tonic styles. If a particular spirit pairing matters more than twelve equal portions, compare the flavours and confirm the pack format you intend to buy.

What should you check before buying?

Work out how many tonic serves you need, then choose the style and check the exact pack and label.

Priority What to check Your needs
Number of serves A 12 × 150ml case contains 1.8 litres. Count expected tonic drinks and possible refills, rather than counting guests alone. Will twelve 150ml portions cover the drinks I plan to serve, or should I add another case or a larger format?
Regular or Slimline Tesco Groceries lists 32 kcal and 7.4g sugars per 150ml serving for Schweppes regular tonic. Sainsbury’s describes its 12 × 150ml Schweppes Slimline listing as low-calorie. Compare the current labels for the exact packs. I may need both styles if guests have different preferences, rather than assuming one tonic suits everyone.
Flavour pairing Check which spirits and soft drinks you will serve. Fever-Tree describes quinine and bitter-orange oils in its Premium Indian Tonic; Fentimans describes its Connoisseurs Tonic as botanical. If I am choosing a tonic for particular drinks, flavour may matter more to me than an exact case of 12.
Ingredients Read the ingredients and dietary information on the exact variant and pack, including sweeteners where relevant. Do not assume another tonic from the same brand has the same label. Guests may avoid particular ingredients, so I want to check the pack I will actually serve.

What can catch party hosts out?

  • Counting guests instead of drinks

    A 12 × 150ml case contains 1.8 litres, which covers twelve 150ml portions—not necessarily a full evening’s tonic for twelve guests.

    Estimate the number of tonic drinks and allow for refills before deciding how many cases to order.

  • Assuming regular and Slimline suit the same preferences

    Tesco Groceries lists 32 kcal and 7.4g sugars per 150ml serving for regular Schweppes tonic, while Sainsbury’s describes the Slimline variant as low-calorie. Their ingredient labels should also be checked separately.

    Choose the style guests are likely to want, or provide both when preferences differ.

  • Treating every tonic as the same flavour match

    Brands describe different tonic styles and botanical ingredients; those descriptions do not establish how every guest will find them with a particular drink.

    Consider the spirits you are serving, then check the tonic’s flavour description and pack size before buying.

Which brands and retailers are relevant?

Schweppes

Tesco Groceries and Sainsbury’s list regular Schweppes tonic in a 12 × 150ml format; Sainsbury’s also lists Slimline in that format.

  • Both listed styles provide twelve individual 150ml portions.
  • Check the regular and Slimline nutrition and ingredient labels separately.

Fever-Tree

Fever-Tree describes its Premium Indian Tonic Water as containing quinine and Mexican bitter-orange oils.

  • The brand positions this tonic for mixing with gin, vodka and fortified wines.
  • Confirm the pack count if twelve individual portions are essential.

Fentiman’s

Fentimans describes its Connoisseurs Tonic Water as a botanical tonic containing quinine.

  • The manufacturer identifies this product as gluten free and vegan.
  • Check the pack format and the label of the product you intend to serve.

Britvic

Britvic identifies mixers in its drinks portfolio and also names The London Essence Company.

  • Its portfolio provides another range to consider when choosing mixer flavours.
  • Check individual product listings for the flavour and pack count you need.

Tesco

Tesco Groceries lists Schweppes Tonic Water as a 12 × 150ml pack and provides a per-serving nutrition panel.

  • The listed pack size and nutrition information help with portion planning.
  • Check the listing for your delivery area and shopping date.

Sainsbury’s

Sainsbury’s lists regular and Slimline Schweppes tonic in 12 × 150ml packs.

  • The two listings offer regular and lower-calorie styles in the same pack count.
  • Check the selected listing and delivery area before ordering.

Joybuy cases of 12

These Schweppes cases cover the Slimline and regular tonic choices for twelve individual 150ml portions. Choose between them according to the style you plan to serve, and allow for extra mixer if guests may want refills.

Schweppes Slimline Tonic Water, 12 × 150ml

Schweppes Slimline Tonic Water 12 × 150ml

For hosts offering a Slimline tonic in individual portions. The case contains twelve 150ml servings; check the current ingredient label if guests avoid particular sweeteners.

View on Joybuy
Schweppes Indian Tonic Water, 12 × 150ml

Schweppes Indian Tonic Water 12 × 150ml

For hosts choosing regular tonic for mixed drinks. The case contains twelve 150ml servings; check whether that covers the drinks and refills you expect to serve.

View on Joybuy

Questions about party mixers

How much mixer is in a 12 × 150ml tonic case?

A 12 × 150ml case contains 1,800ml, or 1.8 litres—twelve 150ml portions. Count likely refills when deciding whether one case is enough for your party.

Should I buy regular or Slimline tonic?

Choose regular Schweppes tonic if you want that classic style of mixer, or Slimline if a lower-calorie option is the priority. Tesco Groceries and Sainsbury’s list the relevant Schweppes styles in 12 × 150ml packs; check the exact product’s current ingredients and nutrition panel before ordering.

Can guests drink tonic without alcohol?

Yes. Sainsbury’s describes Schweppes tonic as suitable to drink straight as well as mixed with gin or vodka, so it can be offered on its own to guests who do not want an alcoholic drink.