Weck Jar Cap, Storage Lid Cap, Silicone, For Small Weck Jars, 2 3/8" (60mm) Diameter, Yellow, (2) Free shipping on orders over $50! The Blossom Storage eCap turns Small (2 3/8 rim) Weck jars into an airtight and liquid tight container. Bpa free. Dishwasher, freezer, and microwave safe. eCaps come individually packaged on a stylish card. This makes them perfect for gifts!