Engraved World's Greatest Teacher Glass Treat Goodies Jar. Give your favorite teacher a lovely, personalized teacher gift which will look great in the classroom or at home. Our Personalized World's Greatest Teacher Treat Jar is perfect for storing classroom rewards including stickers, candy or little play toys. Your Engraved Teacher Candy Glass Jar measures 5.5"H x 4"W and holds 26 oz. Each glass jar comes with an air-tight glass lid.