Need a little more power? No problem, the Gameboy coffee mug brings back nostalgic feelings: Do you remember the days when it was just you and your Gameboy? When deadlines, meetings and other obligations were still a long way off and you were fuelled by the lightness of youth. It's high time to revive that curious feeling from back then and treat yourself to a sip from the past every now and then. The heat-sensitive surface reacts to the warmth and begins to change. Mamma mia.