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As for the classics, I prefer the ones made out of glass. Currently using Bodum Chambord French Press Coffee and Tea Maker, Chrome, 34 oz, 1928-16US4, but in future want to try Bialetti French Press Coffee Maker, 8 Cup, Preziosa Stainless Steel.

As for portable ones. I think Stanley 10-01855-013 The Travel Mug French Press Hammertone Green 16OZ / .47L holds temperature the best.

I don’t have a Stanley French press, but I do have one of their vacuum bottles, and it keeps my drinks hot for a very long time.