Unique Design: This holder is patented, and cleverly designed to attach securely to the leg of student desks or tables. Decreases Class Time Distractions: With their water bottle close at hand, students don't have to ask permission to get out of their seat for a drink of water. Minimizes Spills: The holder positions water bottles upright. That means no loose-top bottles spilling water onto or inside of desks, or onto the floor. Safe and Unobtrusive: The holders' foam construction eliminates the possibility of being scratched or poked by hard or jagged edges. Position it out-of-the-way underneath working surfaces. Finally, we This component is optimized for a 1" diameter chair leg but may fit slightly larger or smaller.4 foam water bottle holders