Cigarette filter collecting device i.e. disposable pocket ashtray, has circular opening whose diameter is adapted to passage of cigarette filter, where device has specific volume and is in form of sphere, cube, cylinder or cone
摘要
<p>The device has a circular opening (1) whose diameter is adapted to passage of a cigarette filter, where the device is in the form of a sphere, cube, cylinder or cone. Volume of the device is about 45 cubic centimeters.</p>
