We just got 8 sets of the sea bands from Amazon to keep on the boat. My grandmother discovered them (or something similar) 20 years ago because she'd get motion sickness on long car rides and we've been using them since. I rarely ever get a sick but if we're anchored perchin' in 5' waves, they do work. I think we paid $25 for 4 sets of them and they're prime eligible if you have it for free 2 day shipping.