The Original Square Jar The FourSide jar effectively harnesses the power of your Blendtec blender. Blunt safety blade is thicker and stronger than other blades Made from impact-resistant, BPA-free copolyester 3 3-year warranty Max liquid fill up to 32 oz. Compatible with all Blendtec consumer blenders The FourSide is ideal for Ice cream Grinding grains Soups Smoothies Dips and Batters The FourSide jar’s square shape blends much better than traditional round jars. The jar also generates more friction, heating soups, and hot drinks quickly and easily. It’s also especially good for grinding grains and making smaller quantities. *NOT FOR COMMERCIAL USE – If used commercially, the warranty will be voided. *If you’re looking for a home kitchen model, then feel free to check out our available Blenders.