On a Galaxy Class starship, beneath the Engineering deck is Cargo Operations. Sure, there are expansive cargo bays in the saucer all the way up on deck 12, but that’s where all the fancy storage is. It’s all climate-controlled, well lit, and is where all the important stuff is stored; critical medicines for far-flung colonies, sensitive equipment for terraforming teams, even genetically-enhanced humanoids stored in stasis to be used as gifts in diplomatic functions. But down on the lowest decks is where all the really good stuff is stored. We’re talking contraband like illicit alcohols from unfriendly powers, bat’leths with dried blood on them, and quasi-canonical helmets. All that stuff has to be kept safe, but in a way that doesn’t draw a lot of attention to it. This is where the TNG Collapsible Storage Cubes come in to play. They can store flat when not in use, but expanded to store nearly 36,000 cubic centimeters of goods. 33cm on a side, 13-inches for those still using the Imperial system (I’m looking at you, Pakled-Planet), it’s room enough for all your bits and bobs picked up from shore-leave.