This new Blendtec two quart home Jar is made from BPA-free copolyester material and has an with easy open lid that features all the unique Blendtec advantages. The classic square Blendtec design combined with the special blade design make for a very efficient blending jar. This special square jar creates a vortex that minimizes cavitation and the blade keeps the ingredients pulled down meaning better blends in less time. This special combination of features allows the Blendtec 2 quart jars to be used without a tamper like some of their competitors.