These folding cup holders are ideal for many situations where stability is essential. Comes in 2 sizes, regular and large. Suction Pad allows for stability. Also available to fit round or square wheelchair/scooter tubing and folds out of the way. FCHModel: H-131 Regular Cup Holder(+29.95)H-191 Large Cup Holder(+39.95)H-181B Large Cup Holder for Square Tubes(+39.95)H-181A Large Cup Holder for Round tubes(+39.95)