About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out material, long-term or laboratory tests. Our aim is to provide honest feedback to help you make a purchasing decision. For a detailed insight into our comprehensive evaluation process, which forms the basis of all our product reviews, please click here.

KUNU®
premium hot water bottle

The premium hot water bottle from KUNU® is the perfect companion for cold days or for stomach, back or neck pain. The long-lasting release of warmth is guaranteed by the use of sustainable natural rubber. In addition, an extremely fluffy cuddly cover made of soft, low-lint fabric ensures a cozy feeling. The cover is also suitable for machine washing and tumble drying, which ensures an all-round hygienic experience time and time again. In our practical test, the hot water bottle impressed us as a product, but we were also impressed by the lovely package design and the certifications the product has undergone. We would like to see an additional larger version in the future. Overall, however, the hot water bottle from KUNU® comes with an absolute recommendation in every respect.

Advantages

✅ Very good heat retention
✅ Comfortable, soft and fluffy cover
✅ Easy to clean
✅ For cozy relaxation on cold days

Disadvantages

❌ Larger version desirable if necessary

The test

General information

We took a close look at and tested the product in a practical test. In the following, we take a closer look at the features and impressions. From the packaging, materials and quality to the range of functions and handling, the product is subjected to our test procedure.
To give you a quick overview, we work with a points system. The maximum achievable score per area is 100 points. The final overall score is calculated from the average of all tested features, taking into account the respective weighting. For a detailed insight into our comprehensive evaluation process, which forms the basis of all our product ratings, please click here.

The first impression

Packaging and contents

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingCompact product packaging, unnecessary packaging waste has been avoided100 points
Package contents & scopeHot water bottle, no further contents expected100 points
Instructions for useIn German, clearly written, product actually self-explanatory100 points
Total100 points
Weighting: 20%
*The maximum score is 100 points

The package from KUNU® arrives in the form of a cardboard box. In addition to cardboard product protection material, it contains the cream-colored, lovingly designed original box. Although the product appears to be self-explanatory, KUNU® also provides a welcome card with instructions for use and care, contact details and other tips, as well as a voucher code for the next order. Inside the box is the cuddly hot water bottle without any additional packaging material – sustainable product protection and a compact shipping method are thus guaranteed.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceappealing, cozy design100 points
ProcessingHigh-quality materials, no processing defects even on closer inspection100 points
StabilityTear-resistant fabric, elastic natural rubber100 points
Sustainability of the productsustainable natural rubber free from harmful chemicals.100 points
Total100 points
Weighting: 20%
*The maximum score is 100 points
The opened package with the hot water bottle inside.

The premium hot water bottle from KUNU® consists of a bottle made of organic natural rubber and a precisely fitting fabric cover. According to the manufacturer, the bottle offers a safe and robust source of warmth thanks to strict compliance with German quality standards and the BS1970:2012 seal of approval. The closure mechanism also appears stable at first glance and fits into the bottle cover without protruding. The fabric cover is extremely soft and cozy. The seams and surfaces all look very carefully finished and of high quality. The cream-colored look radiates comfort and relaxation. Overall, the bottle makes a great first impression. The product will now be put to the test in the practical test.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
Heat accumulatorReliable heat for several hours100 points
ComfortExtremely soft and fluffy surface100 points
CleaningSuitable for washing machine/dryer100 points
Capacity1 L, possibly larger version desirable.80 points
DesignAppealing, reassuring feel and look100 points
Total96 points
Weighting: 45%
*The maximum score is 100 points

The premium hot water bottle from KUNU® was completely convincing in the practical test .
The extremely soft and fluffy fabric of the cover guarantees a pleasant feel. Thanks to the intelligent product design, the fabric cover is suitable for the washing machine and tumble dryer. Tests have confirmed that the cover retains its shape even after a 30° wash and subsequent drying and is still incredibly soft and cuddly. The fabric is also low-linting and did not leave any marks on various items of clothing and furniture in our test after it had been washed once. At the same time, the bottle has a convincing look and, just like a cushion, fits perfectly into a cozy living environment that radiates peace and relaxation. In the endurance test, the warming effect lasts even after several hours. The product therefore provides a reliable source of warmth throughout the night. The only point of criticism is that although the bottle with a volume of 1.5 L and a capacity of approx. 1 L promises a pleasant design, a slightly larger version would be desirable for the future.

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we examine how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

CriterionRemarkScore achieved*
Price / performance ratioVery good performance in the mid-price segment80 points
Rating cut4.4 out of 5.0 on Amazon70 points
Total75 points
Weighting: 15%
*The maximum score is 100 points

On the Amazon platform, consumers rate the product with an average of 4.4 stars. One common criticism is that the size of the bottle is a little small with a capacity of 1 liter. However, many customers like the quality of the workmanship and the incredibly soft fabric. In our practical test, we were able to confirm that this is a high-quality product that is both visually and functionally impressive. At the same time, we share customers’ desire for a larger alternative.

Prices of up to €14.99 are charged on the Internet for equivalent products. Very inexpensive products are available from as little as €5.99. The hot water bottle from KUNU® is therefore currently in the middle price segment with a price of €10.99. The price-performance ratio is reasonable for the quality and performance received.

Overall result

WeightingScore achieved*
1. packaging & contents20%100 points
2. product processing & appearance20%100 points
3. in the practical test45%96 points
4. price/performance & consumer ratings15%75 points
Total94 points
*The maximum score is 100 points

The premium hot water bottle from the KUNU® brand was awarded an overall score of 1.3 and thus successfully qualified for our test seal. The test was carried out in the test period 11/23 and is stored in our database under the license number 231115026. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

Test result:

1,3

premium hot water bottle
of the brand
KUNU®
achieved
94
Points in our test and therefore passed. The test was carried out in the test period
11/23
and is stored in our database under the licence number
231115026
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observation and do not include long-term or laboratory tests. The test ratings reflect the opinion of our experts and are based on careful analysis. We would like to emphasize that these evaluations do not claim to be exhaustive and reflect both subjective and objective impressions. The assessments are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a reputable and thorough testing process, which has been developed in a long and professional process in close cooperation with our experts.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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Our product evaluations are carried out exclusively through direct, on-site tests. This ensures a detailed and specific examination of the product properties. You can find more information about the test procedure here.

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