The size and shape of the 64-ounce container is ideal for blending medium to large batches. This container can be used with all full-size Classic C-Series Vitamix blenders only (Ascent and Venturist Series are not compatible). Every angle of the Vitamix container is designed to create our uniquely controlled vortex, systematically folding ingredients back to the blades for faster, smoother blends. Every Vitamix container is clearly marked with ounce and cup measurements. Even the lid plug has a 2-ounce measurement line. The vented lid and lid plug let you bring dishes to hot serving temperatures right in the container, or add ingredients while blending to adjust texture.