Name Cone

This is a 3D printing cone. It fixed the problem of people getting the worry umbrella. This is my friend's umbrella, and it was lost one time. Other people took his umbrella, so he asks me to fix this problem. So I 3D modeling a cone and put it on the top, so people can recognize it.

It works really good, but there is a problem, how to make it tight enough. This is the problem I'm still working on.