After nearly six decades, Gerber is all but doing away with the little glass baby-food jars that people have used for making kids' art projects and storing screws, nails, buttons and the like. The company's applesauce, bananas and pears will now come in cube-shaped plastic containers with snap-on lids. Eventually most of the company's baby food products will be switched to recyclable plastic. David Yates, a senior vice president, said Gerber's market research indicates that nearly 70% of consumers prefer baby food in plastic containers. People said plastic is easier to open, stack, store and carry.