When I make my tooter, I start with a piece of foil (preferably Tesco Extra Thick) about 14cm. by 10cm.; fold over about 1cm. of foil at each edge; then fold over two corners, like a paper aeroplane, to form a point. I then wrap this around a Bic ballpoint pen and use the cut off, licked glue strip from a small Rizla paper about 2cm. from the mouthpiece end, like a piece of tape, to hold it all together. (If you can manage to keep yours from unrolling without the adhesive, more power to you ...)
I smoke the gear from a roughly postcard-sized piece of foil; starting at the back corner and running it towards me down the right-hand side, then rotate the foil 90 degrees anticlockwise when I get about a centimetre from the edge. Foil in the left hand, lighter in the right, tooter in the mouth with the opening uppermost so the smoke flows over and up into the tube. After one full turn, I run the next line about 1cm. in from the last one, eventually forming a spiral pattern of "beetle turds".
The tooter can then be unfolded, carefully, to take the bonus beetle; and there will be at least a centimetre border all around to guard against any flare-ups.
I think the tinfoil origami (which everyone I know does differently) is all an important part of the whole ceremony. Just putting the box of foil on the table is enough to trigger a sort of Pavlovian response in me!