Caps and container systems suited to dispensing products like cosmetics. In one aspect, a sensing component receives data from one or more sensors located on the portable electronic device, for example, skin conductivity sensors and determines whether the user is using the portable device, either actively or passively and also determines the identity of the user. The second set of conductive electrodes is configured to interact with the first set of conductive electrodes for activating the reading or writing of display data.