MAKE YOUR DRINK UNIQUE AND NEVER LOSE YOUR WINE GLASS AGAIN! Each magnetic glass marker attaches THROUGH the glass with 2 powerful magnets. Therefore, our charms work on every type of glass, including stemless wine glasses, martini glasses, and beer mugs. They also work on plastics and acrylic glasses, including red solo cups. MATCH YOUR THEME TO YOUR PARTY! With over 20 different themed sets here on Amazon, it's easy to choose a set that goes with girl's night, book club, pool parties and holidays such as Halloween, Thanksgiving and Christmas. PERFECT FOR THE DETAIL ORIENTED HOSTESS THAT LOVES A NEW FIND! Whether this describes you or someone you know, we are confident that people will think these are a hit! Time and again our customers tell us through reviews and repeat purchases that they love these charms and they enjoy giving them as gifts. HAND CRAFTED HERE IN THE USA Simply Charmed is a small owned business located in Libertyville, IL. We craft many of the charms ourselves, and hire the remaining to be made locally. This allows us to focus on quality, not mass production. We stand behind our products with a 30 day "no questions asked" money back guarantee, and a 1 year free replacement on any charm that would happen to come apart.