Amazon's Black Friday sale has Ember Smart Mugs for record-low prices

Amazon's Black Friday deals include record-low prices on Ember self-heating coffee mugs. Typically $130, the 10-oz. Ember Smart Mug 2 starts at $90. The devices keep your coffee, tea or other heated beverage at an ideal temp and make a perfect gift for coffee lovers. The white, black and red variants are all on sale, but the black and red versions cost $100. Only the white model is available for $90. The Ember Smart Mug 2 can heat your coffee between 120 and 145 degrees Fahrenheit, preventing yo...