Question

Plastic cups were used to serve tea in trains in early days- these could be
returned to the vendors, cleaned and reused. Later, Kulhads were used instead
of plastic cups. Now, paper cups are used for serving tea.
What are the reasons for the shift from Plastic to Kulhads and then finally to
paper cups?

Answer 1

Answer:

plastic cups were making worst material so kulhads shifts to paper cups because of paper cups. paper are are made with tree

Answer 2

Explanation:

A little thought showed that making these kulhads on a large scale would result in the loss of the fertile top-soil.