Table Napkin Rings

table napkin
napkin: a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing
A napkin, or face towel (also in Canada, the United Kingdom, Australia and South Africa: serviette) is a rectangle of cloth or tissue paper used at the table for wiping the mouth while eating. It is usually small and folded.

rings
A telephone call
gymnastic apparatus consisting of a pair of heavy metal circles (usually covered with leather) suspended by ropes; used for gymnastic exercises; "the rings require a strong upper body"
(ring) a characteristic sound; "it has the ring of sincerity"
An act of causing a bell to sound, or the resonant sound caused by this
Each of a series of resonant or vibrating sounds signaling an incoming telephone call
(ring) sound loudly and sonorously; "the bells rang"