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25th April 2014
10:00pm BST

Using some fancy techno-gadgets on the inside, it converts the heat from your coffee into electricity that’s used to power an eInk display, controlled via a mobile application where you can upload pics, or choose shots from your Instagram that will then appear on the display at the front of the mug. The picture even stays on the mug after it runs out of battery, which is a nice touch.
Now, we already have plenty of gadgets, not all of which are actually any use to us, but when it comes to ridiculous tech that we didn't know existed but now simply must have, this tops the list, satisfying the coffee hipster and tech geek in us.
Main pic via YouTube, H/T to Mashable and TBWA.com