I got an Ember mug and use it every day and love it. It keeps my coffee at a set temperature (controllable via my phone over Bluetooth) so it doesn't get cold right away, and I can take my time drinking it. I've bought a couple more as gifts since, and the people I gave them to say they like them a lot. The impact on my life isn't anything to get excited about, but it's been positive nonetheless. I don't feel rushed when I drink my coffee anymore, and I'm able to concentrate on my work without that nagging "my coffee is getting cold" feeling.