Cup holder
The coaster is a characteristic round recess, designed, in accordance with the name, to place a glass with a drink. However, the matter is not limited to this, and such equipment can be used in other ways — from installing thermal mugs or bottles in cup holders to using it as an impromptu holder for a mobile phone, monocular, etc. The design of the cup holder can be different: in some models it is just a round hole, in others it is supplemented with a fabric bag, in others a shallow bowl is used, supplemented by a pair of straps to hold the vessel installed inside. And the cup holder can be placed on the armrest, on the shelf-stand (see above), on the side of the seat as a separate device, etc.
Pocket
The pocket can be useful in cases where the user constantly needs to keep certain small items at hand. In this sense, its role is similar to that of a shelf-stand (see above). The difference is that the contents of the pocket are hidden from view and can be more difficult to reach, but they are much better protected from dust, precipitation, etc. In addition, if an object can be accidentally brushed off a shelf, then with a pocket the probability of such an incident is almost zero.
Weight
The total weight of a piece of furniture. This parameter has a dual meaning. On the one hand, a lot of weight creates inconvenience in carrying, and such products are poorly suited for transportation over long distances. On the other hand, more massive structures are more stable, and when using the same materials, usually, they are also more durable than light ones.
Weight, usually, is indicated without taking into account the cover (see above) — this is quite justified, given that the covers are usually made of soft and light materials and their effect on the weight of the furniture itself is almost imperceptible.