21 gifts for geeks and gamers Summary: Give the gamer in your life a geeky gift to remember. By Eileen Brown for Social Business | January 25, 2013 -- 17:41 GMT (09:41 PST) Follow @eileenb Previous | Next Image 14 of 21 Tetris heat changing mug 12oz mug that changes into a game of Tetris when hot liquid is added. Credit: Vat 19 15 holiday gamer geek gifts Topic: Hardware Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.