Firefly Pleasure Plug Medium Blue from NS Novelties. Glows in the dark. Illuminate all your under the covers fun! Soft and comfortable to use, these tapered Thermoplastic Elastomers TPE plugs are body safe and easy to receive. Available in three bright colors and three graduated sizes, these sexy glowing plugs will turn you on when the lights are off. Made of odorless TPE. Suitable for all lubricants. Product dimensions 5 inches by 2.1 inches.