Test Cases For Pen

what can be the various test cases for a pen?

1.To check the pen company
2.to check the pen type
3.to check the pen cap is present or not
4.to check the pen ink is filled or not
5. to check the pen writing or not
6.to check the ink color i.e black ro blue
7.to check the pen color
8.to check weather the pen is used to write all types of papers or not
9.to check the ink capacity of the pen
10.to check the pen product by fiber or plastic or glass
11 to check how long the pen is going to write
12)to check Type of pen (ink,ball,dot etc.).
13)to check Able to write (bold/thin)
14)Grip of the in hand (how comforting is it to hold and write with it?)
15)Type of ink required (ink,gel, fluid, refillable??)
16)Does it have a pocket holding gripe for better carriage.
17)Does the ink leaks in hot conditions or it seizes to flow in cold conditions
18)throw the pen down on floor..to check how much brittle it is ,is it broke down or not.

The test cases should be of high standards.
1.Functional test cases (here we test the functionality of pen e.g. writing in flow or not etc.)
2.User-Interface test caes ( look n feel of pen e.g. cap facility, easy to hold, should be attractive etc.)
3. Stress Testing ( check the temperature dependency e.g can it work if temp is high or low etc.)
4. Performance Testingif we categories every problem then we can write much test cases for that.