To help keep your drinks warm, we've rounded up the best vacuum-insulated thermos flasks below.Shop now First and foremost ... beverage extra warm while you’re sipping away, and we’re big fans of the ...

This is one of the first ever vacuum flasks. While we generally use them to keep our drinks hot, vacuum flasks were invented by James Dewar in 1892 to keep things very cold. Dewar was interested ...