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.

Milu
Thermos flask

The Milu thermos flask made a very good impression in our test. The product has an attractive, flawless design and is made of stainless steel that can be customised with engravings . Thanks to the insulation , both cold and hot drinks can be drunk at the desired temperature over a longer period of time. The outside is always at a pleasant temperature in the hand. A carry bag is included for easy transport, which can be hung or clipped on. The thermos flask has a capacity of 350, 500, 750, 1000 or 1500 ml and is leak-proof . Cleaning is done by hand and is easy thanks to the cleaning brush supplied and the enclosed care instructions.

Advantages

✅ High-quality material
✅ Double-walled insulation
✅ leak-proof
✅ Extensive range of accessories
✅ Large selection of colours and individual engraving possible

Disadvantages

❌ Not dishwasher-safe

The first impression

The packaging and labelling

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 ensured.

CriterionRemarkPoints achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingUnnecessary packaging waste has been avoided, the plastic film protects the product components80 points
Product labellingLabelling available on the carton90 points
MiscellaneousHigh-quality packaging, also suitable as a gift100 points
Total93 points
Weighting: 10%
*The maximum score is 100 points
Thermoflasche Verpackung
Thermos flask
Packaging

For our test, the Milu thermos flask arrived in a typical shipping box. This was undamaged on arrival and could be easily opened by removing the adhesive strip. Inside the product box, the product was wrapped in plastic film. This type of packaging ensured that the thermos flask was optimally protected from external influences and hygienically dispatched. Product protection was therefore fully guaranteed and the product was delivered in perfect condition .
The packaging is partially recyclable. However, the plastic film cannot be recycled . Nevertheless, the presentation of the product makes a very good impression.

After unpacking

Package contents and instructions

ℹ️ Most people’s first impression after unpacking is immediately memorable. Are the contents of the pack complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkPoints achieved*
Package contents & scopeThermos flask incl. carrying bag, spare seal and cleaning brush100 points
Instructions for useWritten in 6 languages, easy to understand100 points
Contact informationCan be found on the box and product, no customer hotline available90 points
Total97 points
Weighting: 10%
*The maximum score is 100 points

The thermos flask comes with a carrying bag, a cleaning brush and a replacement seal. Information on the use, safety and care of the product can be found on the product packaging and in instructions for use in 6 languages.
Contact information can be found directly on the product and on the product box. An email address and Instagram page are provided, but there is no customer hotline. Nevertheless, this is a very good way to send a product.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the product processing. How high quality are the materials used? Is the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceVery good visual appearance100 points
ProcessingVery good workmanship100 points
StabilityVery stable100 points
Sustainability of the productNo information about sustainability, but high-quality materials, stainless steel, BPA-free90 points
Total98 points
Weighting: 20%
*The maximum score is 100 points
Thermoflasche in Tragetasche
Thermos flask
in carrier bag

First of all, the thermos flask makes a very good visual impression. We did not notice any processing faults . In addition, all transitions are clean and there are no scratches or edges to be seen. The product is made of stainless steel and impresses with its simple, timeless design.
There is no information about the sustainability of the product. However, due to the high-quality materials used, we expect it to have a long service life .

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test is the most relevant and therefore the most important. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkPoints achieved*
InsulationUp to 12 hours hot, up to 24 hours cold100 points
UtilisationEasy to use, sits comfortably in the hand100 points
CleaningEasy to clean, but not dishwasher-safe85 points
Capacitydepending on model 350, 500, 750, 1000 or 1500 ml100 points
Design14 colours to choose from, individual engraving possible100 points
Total97 points
Weighting: 40%
*The maximum score is 100 points

We really enjoyed drinking from the Milu thermos flask during the test. This was mainly due to the fact that the thermos flask kept both cold and warm liquids at the desired temperature over a longer period of time. The outside was neither hot nor cold and was comfortable to hold. A carry bag is included for easy transport, which can be clipped on or off. The lid is 100% leak-proof when travelling. The stated capacity of 350, 500, 750 or 1000 ml was confirmed in our test, but we did not have the 1500 ml version. As the thermos flask is not dishwasher-safe, it had to be cleaned by hand. This is child’s play thanks to the cleaning brush supplied and the enclosed care instructions.
Customers can currently choose from the colours berry, buttercream, granite, grey, green, marble, mint, navy blue, olive green, pink, rose gold, red, black and stainless steel and the model with or without engraving .

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we look at 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 analyse consumer reviews and check whether the critical and positive reviews are actually justified.

CriterionRemarkPoints achieved*
Price / performance ratioVery good95 points
Rating cut4.8 out of 5.0 on Amazon90 points
Total93 points
Weighting: 20%
*The maximum score is 100 points

On the Amazon platform, consumers have given the product an average rating of 4.8 stars. One criticism is that the carrier bag does not fit and the lid twists after a while. Other reviewers, however, do not share this criticism. They praise the design, the leakproofness, the ease of cleaning and the quality. We can fully agree with this.

Prices of up to €80 are charged on the internet for equivalent products. Very inexpensive products, on the other hand, are available for as little as €10. The Milu thermos flask is therefore in the lower price segment with a current price of €20.95 – €37.95. Consequently, the price ratio is very good for the quality and scope of services you get.

Overall result

WeightingPoints achieved*
1. packaging & labelling10%93 points
2. package contents & instructions10%97 points
3. product processing & appearance20%98 points
4. in the practical test40%97 points
5. price/performance & consumer reviews20%93 points
Total96 points
*The maximum score is 100 points
Thermos flask
 of the brand 
Milu
achieved
96
Points in our test and therefore passed. The test was carried out in the test period
03/23
and is stored in our database under the licence number
230225012
. 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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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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