High quality and sturdy. Very satisfied. The cups all nestle together tightly so nothing comes flying out during the shaking process. High Plains was also the best price I found on The internet
If you do any sort of gold panning then you need to recognize the importance of properly classifying your material before processing it in any capacity. When sluicing, particularly at home with a recirculation system, classifying will increase you recovery greatly as same sized particles allow the gold to settle out much easier due to density and displacement properties. It will not battle with black sands as much either. Happy explorations in Nature!
The only way they could be improved would be to make 'em bucket circumference.