The lanky 26-year-old Chennai bowler would also be the brand ambassador for its new dairy product Cavin's Milkshakes, said a company media release today.
Ashwin is an integral part of IPL team Chennai Super Kings, who have reached the Twenty20 League's play-off stage.
He is also a member of the 15-member India squad for next month's ICC Champions Trophy to be played in England and Wales.