one aperture is attached to a cylinder shaped vessel having an inner lining defining an internal cavity at least partly filled with a bottom layer of immobile material and an upper layer of nonflammable material application_number US 63961803 A description the present invention relates generally to ashtrays specifically the invention is a lockable ashtray that hides cigarette butts from view in a preferred embodiment the invention is an ashtray with a lockable hinged dome cover to hide discarded cigarette butts from view still more specifically the invention is an ashtray that reduces the accessibility of discarded butts to children and homeless people who might desire access to discarded butts fig1 shows an environmental perspective view of a lockable ashtray denoted generally by the reference numeral 100 in this embodiment the lockable ashtray 100 sits atop a trashcan 120 of generally cylindrical shape the trashcan 120 defines an inlet 240 for handling general trash it should be understood that the terms u201c used cigarette u201d and u201c cigarette butt u201d are regarded as equivalent terms still referring to fig1 an adult smoker 140 is shown discarding a cigarette butt 160 into the lockable ashtray 100 the lockable ashtray 100 comprises a dome.