Variable Speed Control: Easily adjust speed to achieve a variety of textures. The dial can be rotated at any point during the blend, so you re in complete control. Large Batches: The size and shape of the self-cleaning 64-ounce container is ideal for blending medium to large batches. Design Feature: Radial cooling fan and thermal protection system. Hot Soup: The blades in the Vitamix container reach speeds fast enough to create friction heat, bringing cold ingredients to steaming hot in about six minutes. Hardened Stainless-Steel Blades: Our aircraft-grade stainless steel blades are designed to handle the toughest ingredients, so from the first blend to the last, you get the same quality results.