these do anything but SUCK! put cups on boatcover in absolutely no wind. left overnight, again no wind or waves. 6 out of 8 were off next morning. tried getting them wet? worst yet. if cups are under water on boat, they will not stick to anything. plus, dont drop them in water....cause the sink like rocks!!! even more fun trying to find them...
(2 of 3 people found this review helpful)