rachelrwrote a review of Hydro Flask 12oz Food Flask on October 18, 2016
I really wanted to like this food flask. It actually keeps food hot, and doesn't leak. However, about half the time, a vacuum forms and the lid won't come off without a lot of effort and it involves immersion into very hot or boiling water to break the vacuum seal. I bought it for my daughter for her school lunches, but now I always have to pack backup food for her in case the teacher can't open it because of the overzealous vacuum issue.