Take a step back in time with the Ball Aqua Vintage Regular Mouth Quart 32oz. Glass Mason Jars. Near the turn of the century, the color was unexpectedly created when the minerals in the sand used to make the glass jars mixed to form a gorgeous blue color. These beautiful aqua jars became popular for preserving and storing jams, jellies, and other recipes. You can replicate that experience with these collector's edition mason jars with the added assurance of SureTight lids, which will keep your preserves fresh for up to 18 months. Material: Glass Care & Cleaning: Dishwasher-safe Weight: 2.5 pounds Capacity (Volume): 32 ounces Neck diameter: 2.75 inches Made in the USA