Arabica coffee increased for the first time in more than 10 days on Wednesday amid speculation that blenders might start using more of the Starbucks-preferred beans to blends, while Robusta beans added 12% this year following a 6.3% climb in 2012. May Arabica futures advanced 0.6% to $1.3385 a pound earlier on Monday session in New York, while May Robusta futures slid 0.3% to $2,148 a metric ton in London.