hmmm i now you can make bowls out of clay, its not even expensiv in materials. you can make a bowl, scoop it up and then throw the bowl with the poison food faaaaar away XD or you place it somewhere and wait. hmm i know you have "pour it out" option with bowls too in case of "you filled it with water".. but i cant remember if it works with food too.
Hope it helps. Have a nice day