The Original Glowing Blacklight Bubbles TEKNO BUBBLES® may look and act like normal bubbles under ordinary lighting. But put them under a UV (blacklight), and they give a whole new meaning to “Glow in the Dark.” Tekno Bubbles MUST be used with a 365nm blacklight for them to glow! Tekno Bubbles® Gold Created over 20 years ago, Tekno Bubbles® Gold was our FIRST patented UV blacklight bubble, and it’s still the Gold Standard. Transparent in daylight, Tekno Bubbles® Gold shimmer like their solid 14K cousins under UV blacklight – at a fraction of the real thing’s price!  Suitable for use indoors and out. Tekno Bubbles® Blue These bubbles are as glow-tastic as Tekno Bubbles® Gold, only they glow a dazzling Blue under UV Blacklight. Details Both colors available in: 1/2 Gallon (RTU) 1 Gallon (RTU) 1 Gallon Concentrate Bulk orders available – just ask! Safe, non-toxic and non-staining Made in the USA Want to know the secret to our amazing, glowing TEKNO BUBBLES®?  We’ve harnessed the energy of black light, turning this invisible light into crazy glowing light you can see. ?Note: For Best Results, use with black light at 365 nm wavelength. Most new LED black lights glow at 390-400 nm, resulting in diminished brightness.