Where I lived in India many years ago they used glass cups not clay. I have a vivid memory of sitting at a roadside stall, enjoying my cup of chai and then watc

Where I lived in India many years ago they used glass cups not clay. I have a vivid memory of sitting at a roadside stall, enjoying my cup of chai and then watching in horror as the chaiwalla squatted beside the gutter with a pitcher of cold water and rinsed out the cups using his grimy fingers to swish the water around. Yes, disposable clay cups would be a major improvement.