Glow cups or glow glasses really get the party glowing they come in 4 neon glow colours blue pink yellow and green and are real eye catchers lots of funr half pint 12oz glow in the dark cupsavailable in four coloursthe glow travels freely around the entire cupglowing for around 8 hoursfully uk certifiedglow cups include 1 activator per 4 packto activate your glow cup centralise the base of the cup over the peak of the activation button included and press down to firmly apply pressure