I gave a whole bag I saved for a pin wall to goodwill when I moved 
The pictured xmas tree would really look neat as table decoration, no needles and cleanup… I think you need something like a cardboard from a kitchen paper making the roll and then glue the halves from bottom upwards…
Now I have to drink lots of wine 
to save corks… 
well one glass of red wine is considered healthy… perhaps I’ll find folks to join 