Show your creative side when you fill these plain glass jars with fabulous treats for your next event. These favor jars are made of clear glass in a square shape and have a cork top. There is a 1 inch round opening at the top. The jar has a 2.75 fluid ounce capacity. They are fun and versatile for all types of occasions - fill with sweet treats, personalized messages, small trinkets, honey, handmade jam and more!