Penny walked to the table and got a ramekin and filled it half full with cow's milk. She went back and practiced the incantation. 'Firmus lac lactis, Firmus lac lactis.' she repeated. Then she picked up her wand and praticed. When she was ready she looked at her ramekin. "Firmus lac lactis." she said and waved her wand. When she got the milk to consistency she needed it, she sat back and smiled to herself.