for cup

1) check it can properly contain liquid and not leaked.

2) test that its size and shape as per user requirement or

not.

3) test its color as per user requirement or not.

4) test its material as per user requirement.

5) test it with maximum hot/cold and minimum hot/cold

liquid.

6) check its strength that whether it can be broken easily.

7) check its with heat and cold environment.

8) put it in fron of direct sun light for hours.