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I use them everywhere: on the nightstand to organize my tissues, hand lotion, etc.,; at work to organize student work; in my home office to organize client accounts, and in my room to organize just about everything! The way they are useful is limitless, and it makes cleanup easy because you just pick up the tray instead of several individual items when you need to scrub or dust a surface. They wipe down easily and have a good weight to them. They don't have anything on the bottom to keep them from sliding around on a surface but that can easily be applied.