I'm using a lot the treasures chests that the expansion pack World Adventure has given us. They're perfect to store various Sims' items, they allow some hacks like the "Give" interaction from MTS to work. Actually, I'd like having a chest in all my houses, but even with Create-a-Style, the treasures chests don't fit all the decorating styles...
So, I made new ones. Due to a Workshop bug, they're not based on the WA chests, but work the same, that's why I call them "chest-like": you can store your Sims items in the chest-like by choosing the "Open" option and drag and drop the items you want to store, or to remove.

Site Around the Sims 3
Categories Misc / Other
Direct Link http://aroundthesims3.com/objects/function_storage_misc_02.shtml