I found some small diameter plastic shipping tubes. I turned a Delrin jig to plug the bottom end and to center the tube and a Delrin plug. Mix the resin and then sat it on an upside down vibrator sander for a minute or so. Poured in to the tube. the vibrator action of the sander got most of the air out. Uline has the tubes as do others.
The foil, this was my idea although I never tried it, I believe it is workable. Crumple the foil, smooth it out a little. Glue with CA to the tube. Then scribble different colored magic markers on the foil covered tube. Allow to dry, then with an alcohol soaked rag, wipe off the highlights of the magic markers leaving the high points of the foil exposed as shiny aluminum.