I have couple of different sets, great wine glass accessory. Not only for parties with lots of guests but also for your evening well deserved glass :) Right now mine is music key with blue gems around it

Boston Warehouse sells such beautiful wine markers. They can easily become collectibles. I find them so handy and everyone enjoys picking out their favourite marker. They are very well made and stay around the stem without falling off or breaking apart. They also make lovely gifts and of course any hostess would love a box of these beauties.