The flashing LED ice cubes are non-toxic and made from FDA approved plastic.  Each flashing ice cube lights up with a push button switch on the bottom and can be set to 3 modes.  Rapid Flash, slow flash and solid on.  The batteries have a life of approximately 12 hours of on time and each ice cube can be turned off when not in use to conserve battery life.  The solid color flashing LED ice cubes come in 6 colors.  Red, Blue, Green, White, Pink and Yellow.  We recommend washing the flashing ice cube with hot soapy water prior to each use.  Not dishwasher safe!  We offer this item individually or in bulk packs of 12.  This is a decorative item and will not cool or heat your drink.  To receive the quantity discount pricing please order the flashing LED ice cubes in lots of 12.