A closed cup for dispensing comestible products, such as drinks for babies and infants, includes a double walled body and a top. An electronic assembly is disposed between the two walls of the body and includes one or more light sources arranged to emit light through the body sidewall. An event sensor, such as an accelerometer, senses when a certain event is taking places, for example, the cup is shaken, causing the light source(s) to be activated.