Because I don't like to evaluate a product if I don't have a comparison with other similar ones, I can responsibly tell you a few words about this thermos.
First of all, I own eight top-rated thermoses of different brands according to internet reviews.
Those that cost 45, 42, 40, and 35 euros are inferior to the Healthy Human (620ml) priced at 25 euros, and I say this with certainty because I have tested them by putting ice cubes and cold water at the same time to see which one would keep them longer (they do this on YouTube as well).
The result was that the Healthy Human came in second, very close to a top thermos for the Greek market and quite affordable (25 euros for 500ml, No 1 on Skroutz).
So why aren't both of them advertised on foreign sites, YouTube, etc.?
Could it be because they are better than those with many advertisements and high prices?
The Healthy Human is my favorite because, although slightly inferior to the first one, it has the advantage of a large mouth that allows you to easily put ice cubes and clean it more easily, while the other one with a narrow mouth is not convenient and has an amazing cap with stainless steel on the inside bottom!
I don't want to mention the No 1 because I believe you have understood who it is.
Therefore, for me, the top thermos for cold water according to what the Greek market provides us in terms of price and performance, the Healthy Human is highly recommended!!!!
(I have the 620ml and 1180ml ones)