The holder can be mounted to the wall using screws, double-sided tape, or command hook stickers. It is designed to fit around the neck of the bottle. I printed it using PLA at 20% infill, but one of the tabs broke off. I recommend either orienting the model differently or adjusting the slicer settings. The holders are not spaced out far enough for two alcohol bottles. I was able to fit another cleaner like windex.