# 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.

- [Original product page](https://bargainpostbox.co.uk/product/pioneer-1l-vacuum-insulated-food-flask)
- [View offer](https://bargainpostbox.co.uk/visit/pioneer-1l-vacuum-insulated-food-flask)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Pioneer
- Price: 20.99 GBP
- Previous price: 29.99 GBP
- Discount: 30%
- Price checked: 2026-11-14T10:13:39.880Z
- Rating: 4.5 / 5
- Reviews: 3696

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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.

## 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.

## 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

## Before you buy

- 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.

## In the box

- 2 serving cups (Included)
- Insulated flask (Included)

## 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.

## Customer feedback

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.
- Positive themes: Feedback praises ease of cleaning and says it does not leak.
- Positive themes: 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.

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## Add-ons

- [Thermos Stainless King Cranberry Red Food Flask \(710ml\) 14h Hot \| 24h Cold \| Thermal vacuum insulated stainless steel metal hot food container with lid for soup, meal prep, work packed lunch, camping](https://bargainpostbox.co.uk/visit/pioneer-1l-vacuum-insulated-food-flask)

## Images

![Pioneer 1L Vacuum-Insulated Food Flask — 1](https://bargainpostbox.co.uk/i/wUsKzMgJFigqe6ADlDQtZd1wPcpWwgCJuRTyCQ7izhkHlgr-1mvN1HIHRporeTSqyWApX6eISzXn8n95vQuVS84PE1s8aj6EDaLgbTi0YI0IUarn6MrdWkrg.jpg)

![Pioneer 1L Vacuum-Insulated Food Flask — 2](https://bargainpostbox.co.uk/i/7jeqFgqF_7sfHV3rJYOvmdTq7b5R0R4yDujzauiAWRiAu3WS5UWfL6NEtl1_vBn9TC1-Te7R4hbNtgGLIItjHh7bnbICdGIFzyIoGY6z5zt8lc8r.jpg)

![Pioneer 1L Vacuum-Insulated Food Flask — 3](https://bargainpostbox.co.uk/i/VhbH7D8F9Bda8NV9fs9--NHyp1E1VQp4JiQJ5vB948Oe_iZMdz9JRkINLPLiE5PucvaC8ppKC2VN_VXS07MZPfxPuFjpqbXjewEBU8nLTf1-X9FOGR3aCxDz.jpg)

![Pioneer 1L Vacuum-Insulated Food Flask — 4](https://bargainpostbox.co.uk/i/9ShY_Xp54LeWhttJECLcgtXDvmINduaF_H0Gx33D2ogVaAOaK_iDhM288UhgnvWq5dB60RkBkVqcX3uiBneBwt_QXSs2FcH3YKCEZD0WfHLr44FOLCWcjfmg.jpg)

![Pioneer 1L Vacuum-Insulated Food Flask — 5](https://bargainpostbox.co.uk/i/yZnddyEA48pq5jXjTZ4ml6KtP5kKQNjiVdplzemz75tiHM_AIM4DPlthxLVlwPWHKuO4y5WDtZYXwRwQJqTt1KcFgWLXMHTMe4lBd8uUrPC4BsOI_7vRMSTH.jpg)

![Pioneer 1L Vacuum-Insulated Food Flask — 6](https://bargainpostbox.co.uk/i/l-ioHc0moPdwLeWtdbqvaviJljdvJ1js6L33YKZ6MJNktkfgllPUm8dMrYeaeqvBRjsd5YVf_vce-BevMpZcaP7rVgi5TuezBUoDHchHKb0t26Tbj9fGXl8J.jpg)

![Pioneer 1L Vacuum-Insulated Food Flask — 7](https://bargainpostbox.co.uk/i/Qhtz95N2mavVTDj_QDiAKrmkUEZtI_SHhNDEaEIRAPPnTmEHn0SEUTPM_mmwNznWKzBt5yCZspeH7agsbLhFohJ7oAvCp7zY1QmhMJScO6Quq70rFF8QGq2q.jpg)