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I use this flask to keep my soups and other food hot while on my walks. I fill it around 7.30 or 8.00 am and stop for lunch around 1.00 pm, and it's always piping hot.
The bottle kept my food warm for 4 hours.
The food stays warm for most of the day, but if the tins are not filled, it won't retain heat as effectively.
I am happy to say that the soup is still hot at around 1.30-2pm, often hot enough that I need to blow on it before eating it.
The food stayed warm enough to eat but not piping hot till about lunchtime.
When the food cools down, it creates a pressure vacuum which makes it impossible to open the lid. I tried to unscrew one of the lids and it exploded, narrowly missing my face and leaving a huge dent in the ceiling.
The food became cold in 3 hours, despite pre-heating the flask with hot water. Additionally, the outer shell was warm from the hot water, indicating poor insulation.
91% highlighted the convenience, but 9% struggled
I unintentionally kept the soup warm for about 8 hours using the bottle, which keeps it warm for a long time.
I found that the flask fits nicely inside my school backpack, making it convenient to carry.
I paid more for the Thermos brand assuming it would be of better quality, but it was not the case.
I have to put the rubber seal back every time I wash it, which is inconvenient.
The outer silver lid separated from the black inner lid soon after I purchased it. I only washed the lids by hand, but the glue came unstuck on two of my flasks.
On occasion, I find the bottle difficult to open due to its smooth surface.
I recorded the temperature of the water in the thermos at different time intervals. It was 190 degrees after two hours, 180 degrees after four hours, and 170 degrees after six hours.
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