An apparatus and method for organizing, storing, andor filing items, with a primary receptacle that is mountable to a wall and supports additional receptacles via attachment to and suspension from a hook that is pivotally attached to a bottom of the primary receptacle. The cap assembly includes a securing member including second tabs for cooperating with the first tabs to selectively secure the cap assembly to the bottle and an indicator member disposed between the securing member and the bottle having a sidewall visible through the securing member. The nanochannel exposes an exposed portion of the carbon nanotube at a bottom wall, and the top electrode is positioned over the exposed portion.