Cat
Cat portability presents significant logistical challenges. Adult specimens weigh between 4 and 5 kilograms on average, requiring dedicated carriers for transport. Movement triggers stress responses in most felines, manifesting as vocalisation, elimination, or escape attempts that complicate transit considerably.
Short-distance portability within domestic environments proves more successful. Cats tolerate being carried for brief periods, particularly when transport terminates in food provision. However, the cat fundamentally resists portability, preferring autonomous movement to passenger status in all but exceptional circumstances.
Umbrella
Umbrella portability represents the device's primary design achievement. Collapsed dimensions average 25 to 35 centimetres in compact models, fitting within bags, briefcases, and dedicated pockets with minimal spatial impact. Weight rarely exceeds 400 grams, creating negligible burden during transport.
Modern folding mechanisms enable deployment and collapse in seconds, permitting rapid transitions between portable and functional states. The umbrella accompanies its owner without complaint, requires no feeding during transit, and never attempts escape from carrying vessels regardless of journey duration.