Versatile, clip-on cup holder securely and easily attaches to vertical, horizontal or diagonal bars for easy access to beverages. Use on a desk, chair, table, music stand, walker, scooter, bike or wheelchair to hold bottles up to 3-1/2" in diameter. Lined with a nonslip, textured material, the strong clamp tightens with a simple twist knob for hassle-free installation on any bar measuring between 1/8" to 1-1/2" in diameter. Swiveling base allows the drink holder to be placed at any angle. By using this clip-on cub holder, students can avoid long trips to the water fountain to stay engaged and learn with their water ready at their desks. Extra-large cup holder helps avoid accidental spills, tips and slips and keep important technology equipment, homework and papers safe from drinks and spills.