Question

why is tumbler not made with a piece of cloth​

Answer 1

Answer:

A tumbler needs to hold water.  Because of pores among the fibres of cloth, water leaks out through pores. 

A tumbler also needs to be rigid/strong, it must retain its shape when we invert it.  When we try to pour water from the cloth tumbler, the bottom of the cloth does not go up. So water does not come out of it. You have to hold the bottom of cloth and lift it up.

Also, cloth absorbs water and becomes wet. It becomes unsuitable.

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Answer 2

Answer:

This is because the main function of a tumbler is to fold water and a piece of cloth does not hold water. ... A tumbler made of a piece of cloth cannot be used to keep water. So, a tumbler is made with a material (mostly plastic) which has a property to hold the liquid.