Seat Sack® 10-Pack Clip-On Cup HolderSave on these clamp on, adjustable cup holders when you purchase in a bundle! These drink holders securely attach right at a student or office workers desk, chair, table or even on a mobility walker or wheelchair. Perfect for student beverages at their seat. The cup holder accessory easily attaches with a strong clamp. Fits water bottles, cans, cups and tumblers. This desk organizer is an ideal way to keep papers dry and desks free from distraction.