Currently these methods to not effect coord/masks of the bins content, and, e.g., da.bins lacks a drop_coords method. This is very inconvenient, since the only other way to solve this is using the low-level "expert" da.bins.constituents interface. I think there are two options:

• Modify outer methods to drop from da.coords and da.bins.coords.
• Add da.bins.drop_coords

I am not sure yet which is better.