Blendtec FourSide Jar (75 oz), Four Sided, Professional-Grade Blender Jar, Vented Latching Lid, BPA-free, Clear Blendtec products are built to the highest professional standards. No tamper/plunger needed. Professional-grade jar is compatible with all Blendtec blender models (not compatible with Blendtec Mix n' Blend models) The FourSide jar for smaller quantities, grinding grains, and heating soups and drinks through friction heat. It has a 75 oz volume jar with 32 oz blending capacity (wet or dry). Our four-sided jar effectively harnesses the power of the Blendtec blender. The square shape automatically pulls ingredients toward the blade, instead of just spinning them around in a circular jar Includes blunt safety blade which is 80% thicker and ten times stronger than other blades. Blendtec jars are BPA-free and impact resistant Easy-open gripper lid allows ingredients to be added through center opening and vents pressure when blending hot liquids 3 year comprehensive warranty. An American company, family-owned and driven to build the best quality products - without compromise. Engineered and assembled in the USA