Better than as some reviews!

I use the container for walking to warm between what to have in a hard hike in the belly!

Granted, 350 ml content is very little, so I bought 2 of the containers.
Advantages are that things fit the backpack in the side pockets and I can also take two different meals!

For the matter of the keeping warm: I made the classic test with the hot water from the tap!
Water is turned on until the water has evaporated and then properly filled to the brim.
Lid on and turned off and waited half an hour.
Best feature whether a container is properly insulated the test hold by hand to the container. If the container is hot outside, it isolates the heat very poorly. But if he is cold, it can be assumed that the contents remain long warm.
This vessel was barely warm, the cover was something to remember, the part made of stainless steel was cold, so I was very confident.
Waited another 3.5 hours screwed container and finger kept clean if the water is still warm and it was still really warm. I think the food is much warmer than the water from the tap from the cooking pot, so it can be assumed that food is very long stay warm.
Then I checked the tank for leaks. Have put him on the head, rolled over my living room carpet, shaken for several minutes and have looked to see whether somewhere water is seen on the vessel, it had left no water.

Conclusion:

Positive: good insulation, sealing well. The dishes are made to last warm, the cover is easily screwed and keeps absolutely tight!

Negative: 350 ml are too small for a meal for an adult, but since the part will only cost 8 Euros, 2 containers with 700 ml are totally ok
Another disadvantage of the container is not dishwasher safe, so always clean by hand and with a sponge!

------------------------------------------------------------------------------------------------------------------------

Addendum: I once performed the endurance test. Brought water in the kettle to boil, poured into the container and 24 !! Waiting hours, even after the whole 24 hours, so
after a day on waiting time, the water is still been lukewarm !! As already mentioned, I can not understand at some customer reviews. The container is of the insulation
absolutely top notch. Why is written that the container supposedly not intended to keep the food warm, probably remains the secret of the People!