Ember Temperature Control Smart Cup, 6 oz, App-Controlled Heated Coffee Cup, Espresso Mug with 90 Min Battery Life, Black

This is just right if you drink cortados... It's a little small for a regular latte of cappuccinoFits well over a scale in my espresso machine, unlike the 10oz mugFeels good in the handBattery lasts 30 min moreThe only problem is that my unit is buggy, it sometimes shows as empty, when the cup is fullThe same coaster pin issue plaques this also and so keep the coaster dry, wipe it after every useThe coating tends to scratch, avoid an abrasive spongeWhen it works, it's just right, but it always doesn't