Many professions in certain situations, that is, not enough hands. To cope with such situations in different ways. For example, the shoemaker keeps the nails in his mouth, the seller pencil behind the ear, the cutter sticks-pins-needles in her apron and chalk keeps in a special pocket…
There are almost hopeless situation. In particular, the ladders are extremely uncomfortable to use pouch. As, however, and the roofer on the roof. And to keep your tools, small consumables “at hand, but where necessary” (say, on the ramp) you can not — will definitely slide down.
Even more difficult for the driver: naduma it to get a drink of water at the wheel — too great a risk to be distracted from the road and get into an accident.