According to GCMMF assistant general manager R S Sodhi: ``After milk, the biggest market is dahi. Our estimates are that 25 per cent of the milk market is dahi. To give an estimate, in Ahmedabad alone, the milk market is Rs 500 crore per annum.'' Amul had already marked its presence in milk products like amrakhand and shreekhand. Masti Dahi will be available in plastic cups, priced at Rs 12 for every 400 gram cup. GCMMF has been aggressively pursuing forays in other branded food categories like dals, condensed milk and instant mixes.