Families making separate picnic portions
Four-can packs give you the option to open tins as you prepare sandwiches, wraps or salads. Check the drained weight where it is stated: the weight printed prominently on a tin can include its packing liquid.
Who is a multipack for?
Separate tins let you prepare part of a picnic spread without opening the whole pack at once.
Shoppers choosing a packing liquid or opening format
Spring water, brine and sunflower oil are different ingredients to work into a filling. If opening tins during preparation matters, Sainsbury’s describes a twist-opening SmartStrip on its listed John West brine four-pack.
What should you check before choosing?
Start with the number of tins and usable quantity, then choose a packing liquid and plan how you will handle any opened tuna.
| Priority | What to check | Your needs |
|---|---|---|
| Portions | Count the individual tins and check their net and drained weights. Asda suggests eight servings for its 4 x 145g spring-water pack, but that is a serving suggestion rather than a fixed picnic portion. | I’m making several fillings and want to open only the tins needed. The amount of tuna per person will depend on what else goes into the meal. |
| Packing liquid | Read the ingredients and nutrition information for the exact product. Marks & Spencer lists different fat and salt values for its spring-water and sunflower-oil tuna; a brine product also needs its own label check. | If I’m adding dressing, I want to choose the tuna and packing liquid with the finished recipe in mind, rather than assuming the formats are interchangeable. |
| Opening format | Check how each tin opens and whether you will need an opener. Sainsbury’s describes a twist-opening SmartStrip on its John West 4 x 125g brine pack. | Will I prepare the food before leaving, or need to open tins while packing the picnic? |
| Allergens and leftovers | Check the physical pack for its fish-allergen declaration and current storage instructions. For its spring-water tuna, Marks & Spencer says to refrigerate opened contents and eat them within two days. | Someone eating with us may have a fish allergy. I also need a way to chill any tuna left after opening. |
What can catch you out?
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Treating the tin weight as the amount of tuna
Packing liquid contributes to the stated net weight. Sainsbury’s lists 102g drained weight for each 125g tin in its John West brine four-pack.
Use drained weight where available when planning how much tuna a recipe needs; keep the number of separate tins in mind too.
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Assuming every packing liquid gives the same result
Spring-water, brine and sunflower-oil products have different ingredient lists. Marks & Spencer’s listed spring-water and sunflower-oil tuna also have different stated nutrition values.
Read the label for the pack you intend to use, especially when adding other ingredients to a sandwich or salad.
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Leaving opened tuna with the unopened tins
An unopened multipack and leftover tuna from an opened tin have different storage instructions. Marks & Spencer’s spring-water tuna guidance calls for refrigeration after opening and use within two days.
Open only the tins needed where practical. Chill leftovers promptly and follow the storage directions on the physical pack.
Which brands and ranges are relevant?
These examples show how pack size, packing liquid and opening format vary; a brand name alone does not establish which tin suits your picnic.
Tesco
Tesco Groceries lists its own-label tuna chunks in both spring water and brine as 4 x 145g packs.
- Four separate tins in either listed format allow you to choose the packing liquid for the recipe.
- Check the physical pack for drained weight and preparation details before deciding how many tins to open.
Asda
Asda lists an own-label 4 x 145g spring-water pack and suggests eight servings from it.
- The serving suggestion offers a starting point for planning sandwiches or salads.
- It does not fix the amount each guest will want; Asda also advises checking the physical label for current product information.
Princes
The checked Asda listing identifies Princes tuna chunks in spring water as a 4 x 145g pack.
- Four individual spring-water tins can be opened as different picnic fillings are prepared.
- Check the exact Princes variant: a brine or sunflower-oil pack has a different packing liquid from the spring-water listing.
John West
Sainsbury’s lists a John West brine multipack with four 125g tins, each labelled as 102g drained.
- The product page describes a twist-opening SmartStrip format.
- Check that brine and the drained quantity per tin suit the filling you plan to make.
M&S
Marks & Spencer lists spring-water and sunflower-oil tuna, as well as a 640g spring-water format in its tinned-fish range.
- The listed formats offer a choice between separate multipack portions and a larger tin.
- A larger tin is less convenient if you want to open only a small amount at a time; follow its label instructions for any leftovers.
Tuna multipacks on Joybuy
These four- and six-tin options are relevant when you want to prepare separate portions for sandwiches or salads. Check each pack’s drained weight and exact contents when deciding how many tins your picnic needs.
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John West Tuna Chunks in Sunflower Oil, 4 x 125g
Four individual tins let you open tuna as you make picnic fillings. Choose this sunflower-oil format if it suits the recipe, and check the physical label for ingredients, drained weight and storage instructions.
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John West Tuna Chunks in Springwater, 4 x 125g
The four-tin spring-water format allows you to prepare sandwiches or salads in batches. Check the drained quantity on the pack when planning the amount of filling, and refrigerate any opened leftovers as directed on the label.
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Princes Tuna Chunks in Brine, 4 x 145g
Four brine-packed tins give you separate portions for wraps, sandwiches or salads. If the filling’s salt content matters to you, read the nutrition label for this exact pack; also check its drained weight before planning quantities.
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Princes Tuna Chunks in Sunflower Oil, 4 x 145g
This four-tin sunflower-oil format can be opened a tin at a time for picnic fillings. Check the exact pack’s nutrition information and drained weight rather than treating its 145g net tin weight as the amount of tuna.
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Morrisons Fad Free Tuna Chunks in Spring Water, 145g (6 Packs)
A six-tin spring-water format may suit a picnic requiring more separately opened tins. Confirm the bundle contents and total quantity on the product page or pack before relying on the six-pack description, and check the drained weight for portion planning.
Picnic tuna questions
How much tinned tuna should I plan for a family picnic?
Use the number of tins and their drained weight to plan the filling, then consider whether tuna is the main ingredient or one part of the meal. Asda suggests eight servings from its 4 x 145g spring-water pack, but that suggestion need not match the portions you intend to make.
Which packing liquid works for picnic sandwiches?
Choose a liquid that suits the other ingredients and check the exact product label. Spring water, brine and sunflower oil are distinct options; Marks & Spencer’s listed spring-water and sunflower-oil tuna have different stated fat and salt values, so they should not be treated as nutritionally identical.
Can a guest with a fish allergy eat these tuna packs?
No. Tuna is fish, and the checked ingredient lists identify it as a fish allergen. Check the physical label of the exact pack before preparing food for guests, as product information can change.
What should I do with tuna left after opening a tin?
Refrigerate opened leftovers promptly and follow the instructions on the physical pack. Marks & Spencer’s spring-water tuna guidance says to eat opened contents within two days; its guidance also calls for transferring unused tuna to a non-metallic container.