Fantastic glow cupscome in four colours pink blue yellow and greenglow cups include 1 activator per 4 packsize 12oz or half pintsupplied in bulk packagingthe glow travels freely around the entire cupglow time 8 hours approxvery good qualityfully uk certified2 year shelf life guaranteedr to 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 the glowstick in the base of the cup will crack releasing