Activate the Glow in the Dark by exposing to Sunlight or a Light Bulb. "Epipen Inside” printed on BOTH SIDES. Each keyring is easily attachable to most zippers of medical cases, purses, bags, luggage, or backpacks. High quality flexible rubber PVC, long lasting wear and tear. A great way to inform people of your critical medical needs in an emergency situation. 2 Yellow Fluorescence Silicone keychains. Hang on bags, diaper bags, or purses to notify others that an epipen is in the available in case of an emergency.