Many yellow cube ottomans include built-in storage. Common features noted are: a large internal storage compartment, a concealed/hidden compartment under the seat, and on some models a flip-over serving tray on top that converts the ottoman into a surface.
Common upholstery fabrics for yellow cube ottomans include velvet, polyester, and chenille. Some listings specifically describe the ottoman as velvet- or chenille-covered.
Bins compatible with an 11-inch cube shelving system typically measure about 10 to 10.5 inches wide and high. Example dimensions given include 10.5" W x 10" H x 10.5" D to fit an 11-inch cubby opening.
Kid-focused yellow cube storage items may include safety features such as wall-anchoring/anti-tip hardware. Certifications reported in listings include compliance with ASTM standards and CARB certification where specified.