HoldZie single is the only Patented Bedside Beverage Holder that slides between your mattress and box spring, that was designed to give you the option to "Stay in Bed and Drink". This set includes two WineZie adapters to hold either your stemmed or stemless glass, so you can also enjoy Wine. Just slip the cup holder out and insert your wine glass holder for the glass you want to use. It comes with an easy Height adjustment, so HoldZie can also sit on the floor under your couch next to your favorite chair or even on the patio. When you are done with the days activities you can " Take Your Drink to Bed". Proudly Molded in the U.S.A.