It's the jar that revolutionized high-speed blending. The WildSide+ features an extra-wide base and a narrow fifth "wild" side that helps create a faster, smoother blend. The WildSide+ jar combines with your Blendtec blender to maximize blending performance. It increases blending efficiency for frozen ingredients by up to 25% with the blunt safety blade that is 80% thicker and ten times stronger than other blades in the industry. Made from impact-resistant, BPA-free copolyester. Compatible with all Blendtec consumer blenders (not compatible with Blendtec mixers). The WildSide+ jar also features two vertical ridges on the interior walls to disrupt the blending pattern even further and accelerate the blend. The result? Our fastest, smoothest blends yet. Engineered and manufactured at our Headquarters in Orem, Utah.