Coinstar CEO Paul Davis — whose company owns the Redbox DVD rental kiosks — appeared on CNBC today to discuss a venture that’s almost as important to folks in the media business: coffee. Coinstar shares were up 6% after Coinstar said that by year end it will roll out 500 kiosks under the brand name Rubi that will offer Starbucks-owned Seattle’s Best Coffee. They’ll charge as little as $1 for specialty drinks including mochas and vanilla lattes. Davis also briefly discussed Redbox’s expansion plans, including the streaming venture with Verizon.