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 any material, long-term or laboratory tests. The tests are carried out by 1-2 independent consumers over a period of 7-14 days. The exact test conditions can be viewed in the test plan of the respective test report – click here to go directly to the test plan.

Manufacturers provide the tested products free of charge. We charge a one-off test fee for carrying out the tests. In addition, manufacturers pay an annual licence fee for the use of the Prüfengel seal. We also receive a commission for linking to manufacturers’ websites. These remunerations have no influence on our test results or ratings.

We guarantee transparency and a fair evaluation. For a detailed insight into our comprehensive evaluation process, please click here.

Grinsezwerge
Thermal mug

Product description of the manufacturer

The GRINSEZWERGE children’s thermo mug is a stainless steel thermo container specially developed for children, designed to keep food and drinks warm or cold for longer periods of time. With a capacity of 500 ml, it is ideal for transporting baby porridge, muesli, yoghurt or other meals on the go. Thanks to the innovative stainless steel vacuum insulation, the manufacturer promises a heat retention time of up to ten hours and a cold retention time of up to fourteen hours.

A special feature is the child-friendly design with motifs such as unicorns or firemen, which is specially tailored to the preferences of the little ones. However, it would be desirable if the thermo mug were available in different sizes to meet the different needs of the users.

  • Long insulation performance: keeps food warm for up to ten hours or cold for fourteen hours
  • Child-friendly design: attractive motifs such as a unicorn or a fireman
  • Versatile use: Suitable for baby porridge, muesli, yoghurt and more
  • Limited size options: Only available with 500 ml capacity

The first impression

Packaging and contents

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?

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?

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Product protection

Product is adequately protected by packaging

100

Points

Sustainability Packaging

Unnecessary packaging waste has been avoided, the plastic film protects the product components

90

Points

Package contents & scope

Complete

100

Points

Instructions for use

Instructions and care tips are printed on the packaging

100

Points

TOTAL

98

Points

Weighting: 20%
*Themaximum score is 100 points

The GRINSEZWERGE children’s thermo mug comes in sturdy and attractively designed packaging that reflects the chosen motif of the mug. The packaging is tailored to the product size and does not use any superfluous material, which emphasises the company’s sustainable approach. When unpacking, it is noticeable that the thermo mug is additionally protected from scratches or soiling during transport by a protective film. From a sustainability perspective, it would be nice to do without plastic completely. However, from an environmental point of view, the use of plastic film could be reduced or replaced by alternative materials. The scope of delivery includes the thermo mug itself as well as a practical spoon and a sealing ring, and the handling and care of the product is explained on the packaging.

The first time in your hand

Product processing and appearance

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?

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?

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Visual appearance

Attractive, child-friendly design

100

Points

Processing

Very good workmanship

100

Points

Stability

Very stable due to the use of stainless steel

100

Points

Sustainability of the product

Not specified

90

Points

TOTAL

98

Points

Weighting: 20%
*Themaximum score is 100 points

The thermo mug impresses with its friendly and child-friendly design, which goes down well with children. The choice of colours and motifs – such as unicorn or fireman – are lovingly designed and appeal specifically to young users. The workmanship is high quality; there are no visible sharp edges or production faults. The mug appears robust and stable overall, which indicates a long service life. Even with frequent everyday use, the thermo mug is resistant to knocks and scratches. One particularly positive aspect to emphasise is that the product is BPA-free – an important criterion for health-conscious parents. Although there is no further information on the general sustainability of production, the use of stainless steel and the solid workmanship suggest that the thermo mug has been designed for long-term use.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

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.

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.

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Tightness

The thermo mug remains leak-proof even with intensive shaking

100

Points

Heat storage

The mug keeps warm for a long time as promised by the manufacturer

100

Points

Cleaning

The product is quick and easy to clean

100

Points

Flavour neutrality

In the test, we could not detect any taste or odour of the thermo mug

100

Points

Locking mechanism

Opening and closing the product works perfectly

100

Points

TOTAL

100

Points

Weighting: 45%
*Themaximum score is 100 points

In practical use, the GRINSEZWERGE children’s thermo mug impressed across the board. In the leak test, the cup proved to be absolutely leak-proof. Even with vigorous shaking and dynamic movement, the contents remained completely inside – no leaks could be detected at either the drinking opening or the screw cap. The thermo mug also met expectations in terms of heat retention: Liquids filled in hot kept their temperature over a longer period of time, making the product ideal for hot meals or drinks on the go. Cleaning also proved to be easy – even after being filled with strongly coloured liquids, the mug was completely free of residue and left a hygienically perfect impression. In terms of flavour neutrality, there was no noticeable difference to freshly poured water – a sign of the high-quality choice of material. The closure mechanism was also convincing with its stable, smooth handling and reliable functionality. Overall, the thermo mug proved to be a well thought-out, reliable product for children that is suitable for everyday use.

Test plan

You can find a detailed insight into the evaluation criteria of the practical part of the test and the distribution of points here. If you are also interested in the evaluation of our other test criteria, please read our document on the evaluation process.

Price/performance ratio

and ratings from consumers

Finally, we analyse 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.

Finally, we analyse 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.

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Price / performance ratio

Very good performance in the lower price segment

90

Points

TOTAL

90

Points

Weighting: 15%
*Themaximum score is 100 points

Prices of up to €30.99 are charged on the Internet for equivalent products. Very cheap products are available from as little as €15.97 . The Grinsezwerge thermo mug is therefore currently in the lower price segment with a current price of €19.90. For the quality and performance received, the price-performance ratio is very good.

Overall result

1. packaging & contents

20%

98

Points

2. product processing & appearance

20%

98

Points

3. in the practical test

45%

100

Points

4. price/performance & consumer reviews

15%

90

Points

TOTAL

Points

*Themaximum score is 100 points

Thermal mug
 of the brand 
Grinsezwerge
achieved
98
Points in our test and therefore passed. The test was carried out in the test period
04/25
and is stored in our database under the licence number
250309001
. 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 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.

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Download

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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