So I found a stick. Definitely a hardwood and as I was surrounded by olive and cork trees I'm assuming it's one of the two. Brought the stick home with the intention of making a pipe but I had no tools... Off I go to the local hardware shop and come home with a Stanley knife and a 22mm spade bit. Many many hours and thousands of chips later, I end up with this. No forstner bit to finish the depth, no saw to cut it to length, no wire to solder it up so I put it away for back in Belgium.