Weck 905 Cylindrical Jars, 16.9 Ounce - Set of 6 Weck reusable Glass Jars are of the highest quality and contain NO BPA! (Bisphenol A). This jar is a fantastic size and shape for olives and asparagus, in particular. The most versatile and beautiful preserving jar available today. All jars have wide openings for tidy, easy filling. Replacement rings, lids and clamps are also available.