so i wanna make my own baby food. but i dont want to buy the plastic freezer container to store it in..soooooooo can i use glass baby food jars ( i have some iven to me by wic, i wouldnt feed my baby the contents but i was thinking of dumping them down the drain and then using the containers) to freeze te food. the yare 4 oz..is that too big? will the glass crack in the freezer? how would i then defrost? thanks mamas!!