ECrafty"s 10 sturdy miniature bottles. Each mini bottle measures 18mm or 3/4" tall. 1" tall with cork. Bottle opening is 5mm across. Bottle Diameter(Inside): 3 mm. Bottle Capacity: 0.5 ml. Clear blown glass mini treasure bottles with cork stoppers for interchangeable pendant art, message in a bottle charms, keepsake charms, mementos, altered art, travel treasures, more. Make your own message in a bottle charms and altered art pendants, projects. Or store your seed and matsuno beads with ease. Roll up your favorite art snippet, photo, wrapping paper, postcard, magazine clipping, laser-printed messages or other paper items - insert into bottle for instant 3-D art. Insert entire small flowers, or dried flower petals, fill with clear epoxy for a permanent real flower pendant, or refill with fresh flowers to match your outfit, or sand from your favorite beach and so on.