Who each size suits

Space-first solo or couple cook

If you usually make a few portions, start by measuring where the cooker will stand and be stored. Instant Pot UK describes its 3.8L Classic Mini as suitable for up to four portions, but its stated dimensions still need checking against your own space.

Small-household batch soup maker

If you want leftovers or regularly cook for more people, compare larger pots with the space they occupy. Instant Pot UK points batch cooks towards its 5.7L and 7.1L models; SharkNinja UK describes the 6L Ninja HyperHeat PC201UK as feeding up to six people.

Cautious first-time pressure-cooker user

If the cooking process matters more to you than extra programmes, check the exact manual’s liquid and fill limits, lid instructions and pressure-release method before choosing a model. You will also need a way to blend the cooked soup if you want it smooth.

What to check before buying

Choose the portion size you actually need, then check the cooker’s physical fit and the steps your pumpkin-soup recipe requires.

Concern What to check Who this matters to
Worktop and storage fit Compare stated width, depth and height with the intended space, allowing room to open the lid and release steam safely. If I make only a few portions, I need the cooker to fit without taking over my counter or cupboard. Around 42% of consumers put space first.
Soup-making process Check for the cooking functions your recipe needs, plus the exact model’s liquid, fill and pressure-release instructions; arrange a separate blending step for smooth soup. I want to understand how to cook the vegetables, release pressure and blend the hot soup before relying on a new appliance. Around 33% of consumers make that process their primary concern.
Batch size and other uses Compare usable volume where stated and decide which functions beyond soup you would use regularly. When I cook for several meals, I would rather have room for leftovers than minimise the pot size. Batch capacity comes first for around 25% of consumers.

Mistakes to avoid

  • Choosing by litres without measuring the cooker

    Bowl capacity does not tell you whether the appliance fits on your worktop or in storage. Manufacturer dimensions also need reading in their stated width, depth and height order.

    Measure the intended location and allow practical space for opening the lid and venting steam before deciding whether a larger soup batch is worth the footprint.

  • Expecting pressure cooking to blend the soup

    Pressure cooking softens the ingredients, but SharkNinja UK’s pumpkin-soup recipe calls for a hand blender after cooking to achieve a smooth texture.

    Plan how you will blend the soup after following the cooker’s pressure-release instructions.

    If you do not already have one, smooth soup will also require access to a hand blender or separate blender.

  • Using another model’s liquid or fill instructions

    Liquid minimums, fill marks and release procedures belong to the particular cooker and recipe. Ignoring them can affect cooking and expose you to hot steam.

    Read your model’s manual before first use, stay within its pressure-cooking limits and open the lid only as its instructions direct.

Brands to consider

These manufacturer examples show different capacity and feature choices; compare the exact model rather than assuming every cooker from a brand has the same dimensions or functions.

Instant Pot

Instant Pot UK offers the 3.8L Classic Mini for smaller portions alongside larger models for family or batch cooking.

  • Instant Pot UK lists pressure cooking and sautéing among the Classic Mini’s seven functions, with stated dimensions of 31.8 × 35.1 × 25.6cm in depth, width and height order.
  • For that Classic Mini model, Instant Pot UK lists dishwasher-safe inner pot, lid and accessories and a one-year guarantee.
  • The smaller pot offers less room for large soup batches; check the dimensions and features of the exact colour and variant you intend to buy.

Ninja

SharkNinja UK positions the 6L HyperHeat PC201UK for cooking up to six portions and lists pressure cooking and sear/sauté among its functions.

  • Its listed functions also include steam, slow cook, rice, pasta, simmer, keep warm and yoghurt; SharkNinja UK states a two-year guarantee for the PC201UK.
  • SharkNinja UK’s pumpkin-soup recipe illustrates a process that finishes with separate blending.
  • A 6L bowl does not establish how the PC201UK will fit in a small kitchen; check its external dimensions and operating clearance.

Sage

Sage Appliances UK lists the Fast Slow GO with a 6L bowl, a Soup shortcut and pressure-release settings.

  • Sage specifies 4L usable volume, 1L minimum volume and three hands-free pressure-release settings for this model.
  • Its stated dimensions are 31.3 × 34.7 × 33.3cm in width, depth and height order; measure that space rather than judging fit from the 6L bowl alone.

Joybuy product choices

These choices range from smaller soup portions to 5.7L batch cooking. Compare each cooker’s exact dimensions and instructions before deciding whether its capacity works in your kitchen.

Instant Pot 3.8L 7-in-1 Multicooker in Daydream Blue

Instant Pot 3.8L 7-in-1 Multicooker, Daydream Blue

Consider this 3.8L option for smaller soup batches when worktop space is a priority. Check this variant’s external dimensions, cooking functions and pressure-cooking instructions before buying.

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ochama Mini Green Pot 1.8L Electric Pressure Cooker

ochama Mini Green Pot 1.8L Electric Pressure Cooker

The 1.8L capacity is worth considering if you make very small portions. If you want to sauté aromatics before pressure cooking, confirm that function on this exact model; also check its dimensions, liquid limits and space for the lid.

View on Joybuy
COSORI 5.7L 9-in-1 Electric Pressure Multi-Cooker with Ceramic Non-Stick Coating and Recipe Book

COSORI 5.7L 9-in-1 Electric Pressure Multi-Cooker, Ceramic Non-Stick, with Recipe Book

Consider the 5.7L capacity if you regularly make soup for later meals and can accommodate a larger cooker. Its title lists sautéing among its functions; check the appliance’s dimensions and exact pressure-cooking limits before use.

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Instant Pot Pro 10-in-1 5.7L Multicooker in Black

Instant Pot Pro 10-in-1 5.7L Multicooker, Black

The 5.7L capacity is an option when regular leftovers justify the space. Compare this Pro model’s dimensions and cooking functions with your intended soup process, and follow its own liquid, fill and release instructions.

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Common questions

Will an electric pressure cooker make smooth pumpkin soup without a blender?

Do not assume it will blend the soup: pressure cooking and puréeing are separate steps in SharkNinja UK’s pumpkin-soup recipe. Arrange a hand blender or separate blender if a smooth texture matters, unless the exact appliance expressly includes a blending function.

How much liquid does pumpkin soup need in an Instant Pot Classic?

For the 5.7L Instant Pot Classic, Instant Pot UK specifies at least 375ml of water-based liquid for pressure cooking and says contents must stay below the PC Max – 2/3 line. Those limits are for that model; use the manual for whichever cooker you choose.

Is 3.8L enough for a small household?

A 3.8L cooker can suit smaller portions: Instant Pot UK describes its Classic Mini as making up to four portions. If you routinely want larger batches or leftovers, compare a larger model’s usable capacity with the worktop and storage space it requires.

Which cleaning and guarantee details should I compare?

Check the exact model’s removable parts and guarantee terms. Instant Pot UK lists a dishwasher-safe inner pot, lid and accessories and a one-year guarantee for its Classic Mini; SharkNinja UK lists a dishwasher-safe pot and a two-year guarantee for the Ninja HyperHeat PC201UK. Confirm coverage and exclusions for the model you buy.

Should a pressure cooker for Great Britain have UKCA or CE marking?

For Great Britain, GOV.UK guidance dated 31 March 2026 says CE marking continues to be recognised alongside or in place of UKCA marking where the relevant product regulations meet UK needs. Check the rules applicable to the exact product and its destination; Northern Ireland has separate arrangements.