One other thing to consider when buying a blender is the container that comes with it. Blenders usually have containers that are either made of glass, plastic, or stainless steel. Each one has their own advantages and disadvantages. Glass containers tend to perform better in blenders. Glass containers do not rattle as much as plastic containers once the blender is being used.
Plastic containers may be light, but they can also easily get scratched. Unlike glass, plastic may also tend to absorb the smell of anything contained in it. Glass on the other hand does not and is even easier to clean. Stainless steel may be durable and may have points in terms of attractive design, but they can also be easily dented when not used properly.