3oz Square Jar by CouronneCo. $2.20. Small Clear Recycled Glass Square Jar. Create the perfect party favor, using this recycled glass jar. Available in 3 ounces, this square jar design offers the perfect shape for creating the ideal party favor. Label with a wedding date or initials and fill with Jordan Almonds for wedding favors, or fill with black jelly beans and create an Over the Hill look for a birthday party favor.. Save 50% Off!