When one speaks of capacity, what is really being referred to is the size or volume. Domestic uses for blenders would mostly require one to three liters capacity. Just try to consider the size of the unit and the space it will require for storage. Practically, smaller ones are easier to store and would require lesser space, but you will end up with complicated kitchen works to do multiple blending when larger volumes are needed to be prepared.
Some blender manufacturers do point their edges with stylish and sturdy designs, but stylish may not always equate to sturdiness. When looking for a durable unit, always check the quality of the material used. Also check for critical portions of the body such as the base. It should be balanced and stable, such that it will not tip over when used.
Generally, a steel base is considered to provide the sturdiest and most stable support. However, both the glass and plastic bodied blenders are preferred and more common because it looks more beautiful. Users are able to see through the body and easily check if the texture of the mixture is enough for them already. Glass blenders are stylish, but are often more expensive. It also requires more care as compared to plastic counterparts. Plastic blenders, on the other hand, have a disadvantage of absorbing the smell of pungent foods but are cheaper and more affordable.
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