Crystal Napkin Rings

crystal
a crystalline element used as a component in various electronic devices
Clear and transparent like crystal
a solid formed by the solidification of a chemical and having a highly regular atomic structure
quartz glass: colorless glass made of almost pure silica

napkin
a small piece of table linen that is used to wipe the mouth and to cover the lap in order to protect clothing
diaper: garment consisting of a folded cloth drawn up between the legs and fastened at the waist; worn by infants to catch excrement
A square piece of cloth or paper used at a meal to wipe the fingers or lips and to protect garments, or to serve food on
A baby's diaper
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) sound loudly and sonorously; "the bells rang"
Each of a series of resonant or vibrating sounds signaling an incoming telephone call
(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