I recently started using a 50-year-old vacuum-seal flask that belonged to my Grandpa so that I don’t have to leave the dungeon as often to procure more caffeine. Besides looking totally awesome ...

Hydro Flask was started in 2009 in Bend, OR, by a couple dissatisfied with drinking tepid water. They took the double-wall vacuum insulation technology Thermos had used since 1904 and put it into ...

The vacuum flask has helped warm up explorers in the coldest places on Earth. But the scientist who invented it was actually trying to keep gases at a temperature close to absolute zero.