This flask does work well and keeps the contents very warm for about 6 hours or so. The contents would be luke warm by the 10th hour. I usually fill it with boiling water at about 7 am and the water would be luke warm at about 6 in the evening. I have no problem with this. It however does have one weakness: the handle. The handle seems to be spot-welded on, it broke off within a month or so after Read more
I would recommend this product to a friend.