Simply Charmed High Heels Wine Glass Charms & Magnetic Drink Markers Novelty Glass Markers, Set Of 6 Magnetic wine charms attach through the glass with the use of 2 super strong magnets Therefore, they work on all glasses, including stemless, champagne flutes and even beer mugs To use, place the charm on the glass near the rim, place the 2nd magnet gently inside behind it Great for gifting occasions such as birthdays, hostess gifts, housewarming gifts and more Reusable, unique and fun your guests will love these trendy wine and cocktail markers