The Oster Design for Life 7 Speed Blender features a 6-cup dishwasher safe glass jar that is thermal shock tested for long lasting durability. Reversing motor technology switches the blade direction to eliminate clogging and draws contents in for uniform blending and chopping. Two pre-programmed settings guarantee restaurant-quality frozen drinks and chopping. Powerful patented blending and food processing blades slice, dice, chop and process with precision.