The stainless steel mug is double-walled and vacuum-insulated, which slows down the transfer of heat or cold to keep the contents inside at a consistent temperature. In my testing, I poured coffee ...

The Zojirushi SM-TA vacuum-insulated stainless steel travel mug retains heat, stops spillage, and defies all expectations. And it's only $30.

If your coffee's going cold while you're on your third call of the morning, it's time to upgrade your setup. The Ember Mug 2 ...

However, reviews are slightly mixed, giving these mugs an average 4.1-star rating on Costco’s website. While many praise their durability, insulation, and sleek design, some customers point out ...

Thermos: If you like your coffee hot, this mug's for you: After an hour, the water was still a scalding 183 F. Oxo: Our water dropped 52 F to 160 F.

By Tim Stenovec Jan 10, 2016, 7:10 AM PT Zojirushi One Monday morning last summer, my colleague Ben Gilbert came into the office raving about his coffee mug. Yes. A coffee mug.

The vacuum mug comes in two sizes, but I like the small one because it’s big enough for a good-size cup of coffee or enough water to get you through a long walk on a hot New York summer day.