This clean looking Bookman Bicycle Cup Holder can easily be attached to a bicycle thanks to its clever spring steel construction. The Cup Holder can be flipped and used with either the smaller ring or the larger ring depending on cup size. There's also a "storage cube" included in the package which slots into place when not in use to keep everything flat and tidy. The construction is completely free from screws and glue and the smart clip design makes it easy to use and disassemble if you would need to recycle the product.