oxygen mask
['ping-pong ball', 'sunglasses, dark glasses, shades', 'pickelhaube', 'chain mail, ring mail, mail, chain armor, chain armour, ring armor, ring armour', 'necklace', 'gong, tam-tam', 'ashcan, trash can, garbage can, wastebin, ash bin, ash-bin, ashbin, dustbin, trash barrel, trash bin']