I cannot believe it - yesterday I found this wonderful picture of a cocktail umbrella lantern that left me (and Christiane ;-)) thinking how to make one ourselves.
And today I found a how to video on Etsy. That is really just-in-time delivery ;-)
Here it is:
Just for you, Christiane ;-) I am sure it will also work perfectly with your old Sisal lamp shade.
From now on I will save all my cocktail umbrellas from sundaes, cocktails and the likes as well and make one myself. I hope I can finish this project this year, since I am not a great consumer of cocktails and sundaes ;-)