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The best vacuum flask worth buying

Our pick is the Stanley Classic vacuum bottle. Below: why, what actually matters when buying one, what to get for less, the step up, and whether today's price is a good one.

The flask

Stanley Classic vacuum bottle

Keeps coffee hot through a whole shift and survives being dropped off a tailgate. The same green bottle has been on building sites for generations.

Buy it for
Early starts, cold sites, long drives.
Skip it if
You want it in a car cup holder. Get the tumbler instead.

What actually matters when buying a vacuum flask

  1. Double-wall vacuum insulation. It is what keeps coffee hot for a shift.
  2. Capacity for how long you are out. A liter is a morning for one or a break for two.
  3. A lid that doubles as a cup, and a stopper you can pour through without unscrewing.
  4. Steel rather than glass inside, if it is going to be dropped.

Either side of the pick