You act like I invented the custom. I don't encourage or condone littering but if you've even glanced at the pages from the links it indirectly addresses that.

Also it's much better than the alternative of non-biodegradable plastics.

> Because the shards were unglazed, the cup would simply dissolve over time in the rain and sun, and from the friction of peoples feet walking over it

> No one know how long the tradition of environmentally friendly clay cups can resist the onslaught of cheap plastic.

> But plastic [is] rapidly replac[ing] the clay.

> You act like I invented the custom

I think you've misunderstood, it was I don't think there should be a product which encourages littering. We have paper plates, paper bags, paper napkins which when littered will 'vanish' in probably a few weeks. They are still a litter problem even though they eventually disappear.