Firefly Bowler Plug Blue Medium from NS Novelties. Firefly Glow in the Dark pleasure plugs are made of flexible, odorless, body safe Thermoplastic Elastomers TPE. Available in assorted shapes, colors and sizes. UPC:657447102042. Product dimensions 4.33 inches by 2.28 inches by 2.28 inches. Package dimensions 8.27 inches by 3.94 inches by 2.28 inches. Packaged weight 2.20 ounces.