Dual-Ended Glass Dildos | Double Ended Borosilicate Toys Shop 78 double ended glass dildos in smooth, curved, textured, and beaded designs. Each is made from a single piece of borosilicate glass, phthalate-free and body-safe. Choose lengths from under 4 to over 8 inches for solo or partner play. Free US shipping over $50, discreet packaging.