(CNN) -- Apple CEO Tim Cook might soon be sharing Silicon Valley's most expensive cup of coffee.Sometime in the next year, Cook will sit down for a cup of mud with someone who has paid at least $180,000 for the privilege.Apple fandom taken to its craziest, and costliest, extreme? Perhaps. But it's all for a good cause.Cook has volunteered, through the online-auction site Charity Buzz, to share up to an hour of his precious time with two lucky (and deep-pocketed) winners. Proceeds from the auction will go to The RFK Center for Justice and Human Rights, an international nonprofit founded as a memorial to Robert F. Kennedy by his family and friends.