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Product guide

Pioneer 1L Vacuum-Insulated Food Flask

Pioneer’s 1L Vacuum-Insulated Food Flask is a stainless-steel food jar intended for hot food and beverages, with two serving cups listed among its components. The maker claims hot food stays warm for up to 8 hours, while customer feedback includes reports of heat lasting about 4 hours, so temperature retention may matter if you need a reliably hot meal later in the day.

At a glance

1-litre capacity for a substantial soup or meal portion.
Two serving cups are listed as included components, making it possible to serve without separate cups.
Manufacturer claims up to 8 hours for hot food and up to 24 hours for cold food.
Screw-top closure and an airtightness claim suit carrying food on a commute or outing.

Price

£20.99Save 30%

Reference price: ~~£29.99~~

Price checked: 14 Nov 2026

View offer

Often bought together

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£25.00

Pros and cons

Pros

Large 1-litre capacity, with customers reporting that it accommodates a standard tin of soup.
Two serving cups are listed in the package components.
Stainless-steel body and screw-top closure are specified.

Cons

Hand-wash-only care instructions limit cleaning convenience despite a separate dishwasher-safe claim.

Technical specifications

17 specifications

Identity
Brand	Pioneer

Capacity and use
Capacity	1000 Millilitres
Recommended uses	Hot Beverages, Hot Food
Usage	Food Carrier
Form	cylindrical

Materials and care
Material listed	Stainless Steel
Material feature	Reusable
BPA status	BPA Free
Dishwasher safe	Yes
Care instructions	Hand Wash Only
Microwaveable	No

Dimensions and installation
Dimensions (L × W × H)	11L x 11W x 19.5H centimetres
Weight listed	0.4 Kilograms

Closure and insulation
Closure	Screw Top
Airtightness	Airtight
Special features	Air Tight, Insulated
Claimed hot-food retention	Enjoy hot food for up to 8 hours, and cold food up to 24 hours

What to know before buying

Listing details to confirm

The listing is inconsistent about cleaning: one field says dishwasher safe, while its care instructions say hand wash only. The manufacturer claims hot food stays warm for up to 8 hours and cold food for up to 24 hours, but customer feedback also reports heat lasting about 4 hours. Treat retention times as claims rather than a guaranteed result, and confirm the selected listing's care guidance before use.

What’s in the box

Included

2 serving cups
Insulated flask

Who is it for?

A good fit for

People carrying soup or a hot meal to work, school or on a day out.
Buyers who want a 1-litre container and serving cups in the lid.

Less suited to

Anyone needing microwave reheating or a container with unambiguous dishwasher-care instructions.
Buyers who require a verified minimum heat-retention time.

Pioneer 1L Vacuum-Insulated Food Flask · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 3,696 ratings

5 stars73%73%
4 stars16%16%
3 stars5%5%
2 stars2%2%
1 star4%4%

Customer feedback describes the flask as useful for taking soup to work, with reported strengths including its size, ease of cleaning and resistance to leaks. Some customers say it keeps food warm, while others report heat lasting about 4 hours, which is worth considering against the maker's up-to-8-hour claim if serving temperature is important. Reports also differ on durability. The listing specifies a wide-capacity 1-litre food flask, but the feedback does not establish a consistent heat-retention duration.

Positive themes

Customers describe it as useful for soup lunches and appreciate its capacity.
Feedback praises ease of cleaning and says it does not leak.
Some customers consider it good value and expect it to last.

Negative themes

Some customers report that food stays hot for only about 4 hours, shorter than the maker's up-to-8-hour claim.

Mixed feedback

Durability reports differ, with some customers expecting long service and others expressing concerns.

Frequently asked questions

How much does the Pioneer food flask hold?

The listing gives its capacity as 1000 Millilitres, equivalent to 1 litre.

How long does it keep food hot or cold?

The manufacturer claims hot food stays warm for up to 8 hours and cold food for up to 24 hours. Customer feedback also includes reports of heat lasting about 4 hours, so results may vary.

Can the flask go in a dishwasher or microwave?

The listing conflicts on cleaning: it says dishwasher safe but also gives hand-wash-only care instructions. It says the flask is not microwaveable.

Are serving cups included?

Two serving cups are specified in the manufacturer’s included-components list. Check that the selected listing matches this package.