This is a great flask. I've been using it for a while now and it keeps my soup hot until lunchtime with no leaks. (I heat it with boiling water for 5 minutes or more before filling). I've only used it for soup and drinks, but it would be fine for more solid food as the neck is nice and wide. I think this is the longest I've ever managed to keep a flask without it breaking in some way - I've even had to throw away stainless steel ones because of problems with the screw tops which resulted in leakage. I think I'm going to be ok with this one though as every part of it is solid and well made. A great buy.